It didn't used to be limited, but I believe it's because of frauds and scams. Maybe if you contact cavneb he can work something out?
151 karma · joined October 20, 2017
Styfle already describes it very well, so I'm just gonna add that although I'm seeing a very shaky impression/click rate, and my clicks are below what I expected to receive, the payout is quite big for an ad/sponsor network like this. Also, it's much better than ad networks - no detailed tracking and more (listed below by cavneb)!