This is a massively flawed line of thinking. Filthy rich people don't usually just throw their money around willy nilly. They invest in things that will generate them a return, and normally a provable one at that. Most didn't become filthy rich by accident, and those that did tend to lose everything quickly. To the super rich (or at least those I have worked with in the past) a million dollars is a million dollars. Doesn't matter how many zeros you have in the bank account.
Weitsman (likely) wanted to give huge NIL deals to top players because he felt it could net him a return in terms of relationships (for example, giving NIL to a Zion-type prospect - an NBA all star - nets more personal opportunity than a Jesse type player - a likely Euro featured player), not just because.