He wouldn't be worry, he has been calling Spence Jr for quiet sometime now and is eager to face him. And this will be his perfect opportunity, no more Bob Arum in the middle for him to negotiate with Spence Jr and PBC. He might get the short end of the deal, but still, that money is going to be big.
Exactly, 50% of 10 million is smaller than 40% of 20 million, so the percentage does not really matter and Crawford has to take a low percentage for this fight to finally be sealed. Spence is a PPV attraction, so if Crawford could beat Spence, then he will become popular and next fight of his will make him earn more.