I imagine us free users will just have to make due. It's likely slow and un-rewarding by design to push us towards premium memberships. If I were to suggest a different system, I'd say make credits into a very very small universal payment, and add missions on top of that. So every user would get 1 credit for every hour of browsing (not enough to really make it unfair for those who paid), but there could be "missions" to get extra. These missions could be ad related, recruitment related, or even user made. Perhaps the user could get 15 credits for watching 5 ads, or maybe 2 or 3 credits per new user to the site, or if credits were made transfferable, other users could post requests or tasks and pay for them with a credit amount of their choosing. I.e "15 credits to whoever sends me more of 'x' girl".