Totally meaningless stats, no matter what you are trying to prove. It is utterly irrelevant which payout method you use unless you pick the one which matches each sponsor.

The reason it's easy to argue that PPS is better is that most sites are rubbish and revshare is a waste of time on sites which make no attempt to retain their members. So be lazy, don't check out the sites you promote, do only PPS and you won't be wrong too many times. But you are leaving money on the table with every site which does retain: occasionally a lot of money.

Just a thing, we are not considering that a dollar of today worths more than a dollar from here to 8 months. (discount rate).

as far as galleries i couldnt agree with you any more. but we're talking if we were to send the sales to the same sponsor and picking either pps or revshare.