It used to be that if we invited our friends to EpicMafia, we would get FREE TOKENS, so existing users had an incentive to invite their friends and help them reach 5000 points.
Well Lucid, for "reasons" (????) decided that he could make more money by not giving out free tokens.
If invited users reaching 5000 points gave the inviter 10 tokens for free, then users who are too broke could get colors. Hell, even if someone doesn't have any "friends" they would still have an incentive to create more accounts and be more active, and in terms of AdSense money -- active usercount + registrations per month probably factor into the paycheck.
I bet you that we'd see more new users coming in if we were compensated for organically growing the community, as it was in the past