This is pretty interesting, the way the reddit-style groups that the users create can be ranked by either likes or zaps.
Pay to toppost! Is that a great plan? I dunno. Maybe it is? I'm not against paying artists for their work, but I never really liked karma-whoring and that was just for a highscore not even money.
I remain unconvinced that attaching money to every post is a good plan for a community.