https://www.investopedia.com/ask/answers/09/antitrust-law.asp

I think you should. Anti trust laws prevent buyers from preventing suppliers from supplying to other businesses, but if a supplier pays for themselves to be your supplier, that is not anti trust.

Is Nike in violation because they pay teams to use only their shoes and clothes? Literally think about this. Are restaurants in violation for agreeing to stock only Pepsi products?