Aside from money I'm not sure what surprise are you pointing here? Knowing Mayweather, he's always after for the money.

Whatever it is he will collect his paycheck and probably it's more enough to support his leisure and luxurious lifestyle. He won't stake his name without being compensated the way he wanted, promoters and those people behind this fight knows the characteristic of Mayweather.

After all, it's just another exhibition fight where the losers are those who pay for it, both fighters will get their shares win or lose.