I believe PPV sharing is probably the main reason why they haven't come up with a deal yet. Spence's previous PPV buys are a little better than Crawford's. Spence also has more belts to offer in the division but Crawford is the only ATG of the two.
There's no other reasons, Crawford here has to agree with a small share because Spence will not agree with a 50/50 share.
he has more belts and he has a better PPV record in the past compared to Crawford.
We get it, Crawford is also a champion but Spence have proven enough based on the numbers he have.
However, Spence versus Crawford might be the biggest payperview revenue in the history of boxing. It might be more than the payperview numbers of Mayweather versus Pacman. It would be very stupid for Terence Crawford's team to not demand a share equal to Spence's share.
I'm not sure about this, Mayweather vs Pacman did 4.6M buys, that is hard to crack. Although that Mike Tyson vs RJJ did a decent numbers in the pandemic reaching around 1.65M.
So I'm guessing maybe around that numbers or maybe it will be as high as 2.0M but nowhere close to even Conor vs Floyd or Floyd vs Oscar Dela Hoya.
Mayweather is a PPV king, period.
The reason why he is the richest boxer in the history of boxing if I'm not mistaken, and I don't think the current era of boxers would defeat him. His era is full of exciting fighters, they have Pacman of course, now, boxers doding each other just to remain undefeated.