He may only have 40% (speculated purse cut) slice of the cake but that will be his biggest paycheck in his whole career and he might get bigger earning that Spence.
Crawford might get bigger earnings than Spence on this fight even with a 40% split? How can this possibly happen? Spence is considered the PPV King and almost all his fights are sold-out. That's the reason why he should take 60% of the total purse.
I agree though that even with a 40%, it might be Crawford's biggest paycheck in his boxing history. Fighting against Spence is the biggest fight of his career right now. If he won against Spence, expect more big names that he will face from now on making his paycheck grows.
But Spence is dangerous, he will never allow Crawford to just go wherever he wants. As for now, I'm still in favor of Spence winning the match.