How should Discourse System Market itself?

[michaeld (Michael - Communiteq)]

Many websites uses subscribtion system, make people remember logging in everyday.

How about reply via email and mailing list mode?

Many websites use bonus system, like user level (which often has 10 even 100 levels, rather than 4 levels in Discourse) or Forum Coin , to make people feel that they has gain sth, to make them feel the stimulation / motivation.

Trust levels are more about enabling things based on trust than about showing off. But how about the badge system? Totally awesome.