As far as the sharing of purses is concerned, the best guess is that Crawford understands that he has no power to demand the greater cut because he ain't have the most food on the table. My opinion about this matter is that Spence is really taking his time to drag the fight more, he wanted this to happen but he thinks that it is yet not the right time.
Yes, of course, he has no power to demand a high cut or even an even cut because Spence is still a better PPV attraction than him and has more achievements in terms of the belts they are currently holding. Crawford should accept the terms of Spence as long as it's reasonable to make this fight happen.
That is right! Although we know somehow that Crawford himself knows that he doesn't have any bargaining power at the table unless his cut will be lower than 40% then I think Crawford and his camp start to reconsider that if that is the case. Apart from that, I don't really know why it takes so long in giving some updates about their fight and Spence is really silent these days.