It's still a complicated question - distribution deals often mean there are multiple parties involved, each taking a cut. At Alamy, you get 50% of a sale Alamy makes but if it's a distribution sale , you get 30% (the distributor gets 40%, Alamy get's 30% and you get 30%).

With Shutterstock, the answer is different for subscription sales from OD, SOD and ELs, and for several categories there are different buyer price levels even though the payouts to the contributor don't vary (ELs as one example)

Why do you want to know this? If the details matter, it's really complicated. If they don't, what's the point?