ETF Opportunities Trust 485BPOS

Exhibit 99.(h)(66)

eighth AMENDMENT TO THE 

FUND SUB-ADMINISTRATION SERVICING AGREEMENT

THIS EIGHTH AMENDMENT effective as of the last date in the signature block (the “Effective Date”), to the Fund Sub-Administration Servicing Agreement dated as of August 13, 2024, as amended (the “Agreement”), is entered into by and between ETF OPPORTUNITIES TRUST, a Delaware statutory trust (the “Trust”), Commonwealth Fund Services, Inc, a Virginia corporation (the “Administrator”) and U.S. BANCORP FUND SERVICES, LLC d/b/a U.S. BANK GLOBAL FUND SERVICES, a Wisconsin limited liability company (“Fund Services”).

RECITALS

WHEREAS, the parties have entered into the Agreement; and

WHEREAS, the parties desire to amend the Agreement to update Exhibit A to add the following ETFs and take into account present circumstances:

WHEREAS, Section 11(E) of the Agreement allows for its amendment by a written instrument executed by both parties and authorized or approved by the Board of Trustees of the Trust.

NOW, THEREFORE, the parties agree as follows:

Exhibit A of the Agreement is hereby superseded and replaced in its entirety with Exhibit A attached hereto.

Except to the extent amended hereby, the Agreement shall remain in full force and effect.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed by a duly authorized officer on one or more counterparts as of the date last written below.

Exhibit A

Fund Sub-Administration Servicing Agreement 

Separate Series of ETF Opportunities Trust

Name of Series:

Hedgeye Capital Allocation ETF

Hedgeye Quality Growth ETF 

OTG Latin America ETF

REX Bitcoin Corporate Treasury Convertible Bond ETF 

REX Crypto Equity Premium Income ETF

REX IncomeMax IBIT Strategy ETF

REX-Osprey^™ MOVE ETF 

REX-Osprey^™ BONK ETF

REX-Osprey^™ BTC ETF 

REX-Osprey^™ DOGE ETF

REX-Osprey^™ ETH + Staking ETF 

REX-Osprey^™ SOL + Staking ETF

REX-Osprey^™ TRUMP ETF 

REX-Osprey^™ XRP ETF

SMI 3Fourteen REAL Asset Allocation ETF 

TappAlpha SPY Growth & Daily Income ETF

T-Rex 2X Long ARM Daily Target ETF 

T-Rex 2X Long DJT Daily Target ETF

T-Rex 2X Long GME Daily Target ETF 

T-Rex 2X Long HOOD Daily Target ETF

T-Rex 2X Long RBLX Daily Target ETF 

T-Rex 2X Long SNOW Daily Target ETF

T-REX 2X Long DKNG Daily Target ETF 

T-REX 2X Long BULL Daily Target ETF

T-REX 2X Long XXI Daily Target ETF 

T-REX 2X Long CRWV Daily Target ETF

T-REX 2X Long SMR Daily Target ETF 

Tuttle Capital AI in Healthcare ETF

Tuttle Capital DeepSeek Global AI Innovation and Disruption ETF 

Tuttle Capital MSTR 0DTE Covered Call ETF

Tuttle Capital MSTR Put Write ETF 

Tuttle Capital NVDA 0DTE Covered Call ETF

Tuttle Capital QQQ Put Write ETF 

Tuttle Capital Quantum Computing AI Powered Covered Call ETF

Tuttle Capital TSLA 0DTE Covered Call ETF 

Tuttle Capital No Bleed Tail Risk ETF