Hard to answer.

First: What are your real goals?

I think you should look at governance; your incentives; and the incentives that you provide to your users. The incentives should ultimately bring you (and your users) to your goals.

Personally, I'm disappointed with the "for profit" model of social networks. I think they should behave differently, either like democracies, community centers, or like a church. Specifically, decisions about "what the product is" need a lot more control from the users themselves.