Referral Amounts aren't equal

So I wanted to start working on another Trainn site, but I noticed that referral amount and the cash prize aren't equal on other sites. For example on YouriPodTouch4Free 7 referrals will get you $350; on 3604Free 8 referrals will get you the same $350. Is there a reason for this? I know 3604Free is an older site and YouriPodTouch4Free is newer. Is that the reason? I think they should be the same.

Yep that's why! Desktopcomputers is the worst one, with only $500 with 12 referrals! You should be getting $600 if you did freeiphone.