the thing is that you can't possibly know what would have happened if you'd have sent the traffic to your PPL link instead of promoting revshare, i think you would have earned not double, but around half and here's why:
1) you will get $1/freereg only for tier 1 countries, tier 2 and 3 pays a lot less, with revshare you only see the amount of free regs, but you don't know which tier they are
2) with PPL chaturbate shaves like there would be no tomorrow, i know because i promote both simultaneously and with PPL i get exactly the half amount of free regs than what i get on revshare sending the same traffic for both
so i'd say most possibly you wouldn't get the same amount of free regs on PPL what you got with revshare, let's say half and let's say only half of that is tier 1 (that's just my stats), so you are already making only half with PPL than what you made with revshare
plus if your PPL traffic doesn't convert, chaturbate will shave you even more or even ban you in extreme cases
one thing i haven't tried yet is georedirect when promoting PPL: only allow tier 1 countries to go to the PPL link and redirect tier 2, tier 3 to revshare, but i guess there's a reason why those are the tier 2, tier 3, because they don't buy jackshit lol
Quick update: my earnings exploded since last month. The number of dollars earned with revshare is now higher than the number of free registrations. So definitely choose for revshare! It only takes a while.. 9 months for me.