From my prospective, commissions & content share can be both good & bad...
We shot a few sites with models on a 50/50 share, the said models didnīt expect to wait until ccbill had a payout quota, so a few of the models become anxious waiting for their payouts, they all were paid, but had to wait several months for the payments & this create bad vibes & tension.
Others, this worked well, so this does depend on the model & the trust between you & the model.
I also know other producers who have had no problems with the content share, apart from the content ended up being shown many places where the models & producer didnīt want, and of course, tension become arguments, of which one was the leak...
like with any business, I recommend, itīs best just to pay the model & then you own the content, itīs your rights & your commissions, no stress from other people