Props went from a set per hand to contributed rakeback about a year ago. This was roughly the time that AP went from paying affiliates their share of 9 cents a hand to MGR. Before that point their software was unable to compute true MGR. Props were told when they went to % of rake it was dealt. Props proved this to not be true though and after discussing it with management at the time it was decided the software could not compute dealt rakeback and it was in fact contributed and it went for affiliates and props. It’s not Prima contributed, it is typical contributed. My Poker Tracker stats have shown this was in fact contributed as well. Some have argued about it in the forums. I’m just saying what I have discovered.