Not sure though what his association with Floyd as they have been seen in public together?
Maybe Crawford and Mayweather Jr. have an agreement that they don't want to disclose in public. Way back a few months, Mayweather told the public that if the fight will happen officially, he's the one that will announce it first and only believes in him, not another announcement by anyone.
Adding to that, he also said that he/they will promote the fight. Mayweather won't just promote the fight without any advantages or benefits to him. He won't be called "Money" for nothing. We can now assume that Mayweather holds the right of promotion to Crawford.
Very possible, Mayweather's influence will give him that edge to take care of these promotions.
He's not be called as money if he doesn't bring more to his pocket, whatever his role in this possible upcoming fight will generate
him more money.
It's just needed to wait for the final announcement and what will be the changes that will happen and when the fight takes place.