Certain Amendments to the Original Sponsor Letter. The Original Sponsor Letter is hereby amended as follows:

The below shall be added as Section 21 immediately following the existing Section 20:

Section 15 of the Original Sponsor Letter is hereby replaced in its entirety with the following:

Enforcement Rights. Notwithstanding anything herein to the contrary, but without limiting the last sentence of Section 1(b) of this Amendment and Agreement, the Sponsor and each Insider acknowledges and agrees that each of the Target and the Sellers’ Representative may directly enforce (including by an action for specific performance, injunctive relief or other equitable relief) each of the provisions set forth in this Amendment and Agreement.

Founder Holders’ Representative.

Each of Darla Anderson, Francesca Luthi, and Charles E. Wert (the “dMY Directors”) hereby appoints the Sponsor as agent and attorney in fact for and on behalf of such dMY Director (the Sponsor, in such capacity, the “Founder Holders’ Representative”) to (i) interpret the terms and provisions of Section 2.8 of the that certain Business Combination Agreement, dated as of July 27, 2020, by and among the Company, the Sponsor, Rush Street Interactive, LP, a Delaware limited partnership (the “Target”), the sellers set forth on the signatures pages thereto (collectively, the “Sellers”), and Rush Street Interactive GP, LLC, in its capacity as the Sellers’ Representative thereunder (the “Sellers’ Representative”) (as the same may be amended modified, supplemented or waived from time to time, the “Business Combination Agreement”), and related provisions of

the Business Combination Agreement, (ii) execute, deliver and receive deliveries of all agreements, certificates, statements, notices, approvals, extensions, waivers, undertakings, amendments and other documents required or permitted to be given in connection with Section 2.8 of the Business Combination Agreement, the related provisions of the Business Combination Agreement and the consummation of the transactions contemplated thereby, (iii) receive service of process in connection with any claims arising out of Section 2.8 of the Business Combination Agreement and the related provisions of the Business Combination Agreement, (iv) agree to, negotiate, enter into settlements and compromises of, assume the defense of any Proceedings, and demand arbitration and comply with orders of courts and awards of arbitrators with respect to such Proceedings, and to take all actions necessary or appropriate in the judgment of the Founder Holders’ Representative for the accomplishment of the foregoing, (v) give and receive notices and communications, (vi) make any determinations and settle any matters related to any Tax matters pursuant to the matters contemplated by Section 2.8 of the Business Combination Agreement or any related provisions of the Business Combination Agreement, (vii) administer, pay out, deduct, hold back or redirect any funds (including any Earnout Shares or Earnout Company Units), which may be payable or distributable to any dMY Directors pursuant to the terms of Section 2.8 of the Business Combination Agreement or any related provisions of the Business Combination Agreement for, (A) any amount that may be payable by the dMY Directors pursuant to Section 2.8 of the Business Combination Agreement or any related provisions of the Business Combination Agreement, or (B) any costs, fees, expenses and other liabilities incurred by the Founder Holders’ Representative, acting in such capacity, in connection with Section 2.8 of the Business Combination Agreement or any related provisions of the Business Combination Agreement, and (viii) take all actions necessary or appropriate in the judgment of the Founder Holders’ Representative on behalf of the dMY Directors in connection with Section 2.8 of the Business Combination Agreement or any related provisions of the Business Combination Agreement.

The Founder Holders’ Representative, or any successor hereafter appointed, may resign at any time by written notice to the Buyer, the Sellers’ Representative, the Target, and the dMY Directors. Any change in the Founder Holders’ Representative will become effective upon notice to the Buyer, the Sellers’ Representative, the Target and the dMY Directors in accordance with this Section 3. The Founder Holders’ Representative so designated must be reasonably acceptable to the Buyer, the Sellers’ Representative and the Target, except that the Buyer, the Sellers’ Representative and the Target hereby agree that, subject to the dMY Directors providing prior written notice to the Buyer, the Sellers’ Representative and the Target, any dMY Director will be acceptable to the Buyer, the Sellers’ Representative and the Target as a successor Founder Holders’ Representative. All power, authority, rights and privileges conferred in this Section 3 to the Founder Holders’ Representative will apply to any successor Founder Holders’ Representative.

The Founder Holders’ Representative will not be liable for any act done or omitted under this Section 3, Section 2.8 of the Business Combination Agreement or any related provisions of the Business Combination Agreement as Founder Holders’ Representative while acting in good faith, and any act taken or omitted to be taken pursuant to the advice of counsel will be conclusive evidence of such good faith. The Buyer, the Sellers’ Representative and the Target each agree that it will not look to the assets of the Founder Holders’ Representative, acting in such capacity, for the satisfaction of any obligations to be performed by the dMY Directors, as the case may be. In performing any of its duties under this Section 3, Section 2.8 of the Business Combination Agreement or any related provisions of the Business Combination Agreement, the Founder Holders’ Representative will not be liable to the dMY Directors for any losses that any such Person

(as defined in the Business Combination Agreement) may incur as a result of any act, or failure to act, by the Founder Holders’ Representative under this Section 3, Section 2.8 of the Business Combination Agreement or any related provisions of the Business Combination Agreement, and the Founder Holders’ Representative will be indemnified and held harmless by the dMY Directors for all losses, except to the extent that the actions or omissions of the Founder Holders’ Representative constituted fraud, gross negligence or willful misconduct. The limitation of liability provisions of this Section 3(c) will survive the termination of this Amendment and Agreement or the Business Combination Agreement and the resignation of the Founder Holders’ Representative.

The Buyer, Sellers’ Representative and the Target shall be entitled to rely exclusively upon any notices and other acts of the Founder Holders’ Representative relating to the dMY Directors’ rights and obligations under Section 2.8 of the Business Combination Agreement and any related provisions of the Business Combination Agreement as being legally binding acts of each dMY Director individually and collectively. The grant of authority providing for in this Section 3 (i) is coupled with an interest and shall be irrevocable and survive the death, incompetency, bankruptcy or liquidation of any dMY Director and (ii) shall survive the Closing (as defined in the Business Combination Agreement).

Effect of Amendment. The provisions of the Original Sponsor Letter, as amended by this Amendment and Agreement, remain in full force and effect. From and after the date hereof, references to “this Letter Agreement” in the Original Sponsor Letter shall be deemed references to the Original Sponsor Letter, as amended by this Amendment and Agreement. Notwithstanding anything herein to the contrary, and for the avoidance of doubt, in the event the Business Combination Agreement is terminated pursuant to Article X thereof for any reason, this Amendment and Agreement shall automatically terminate and cease to be of further force and effect.

Entire Agreement. This Amendment and Agreement and the Original Sponsor Letter, as amended pursuant to this Amendment and Agreement, and the Business Combination Agreement constitute the entire agreement and supersede all prior agreements and understandings, both written and oral, among the Parties with respect to the subject matter hereof.

Miscellaneous. Sections 16, 17 and 18 of the Original Sponsor Letter are hereby incorporated by reference and shall apply mutatis mutandis as if set forth at length herein. Descriptive headings are for convenience only and shall not control or affect the meaning or construction of any provision of this Amendment and Agreement.

By:

/s/ Niccolo de Masi

Name: Niccolo de Masi

Title: Chief Executive Officer

SELLERS’ REPRESENTATIVE:

RUSH STREET INTERACTIVE GP, LLC

By:

/s/ Gregory Carlin

Name:

Gregory Carlin

Title:

Chief Executive Officer

TARGET:

RUSH STREET INTERACTIVE, LP

By:

Rush Street Interactive GP, LLC

Title:

General Partner

By:

/s/ Gregory Carlin

Name:

Gregory Carlin

Title:

Chief Executive Officer