I see a lot of information about how to distribute content and revenues, but I don't see how you ensure that enough revenue comes in. Wordpress' Tumblr problem

I see a lot of information about how to distribute content and revenues, but I don't see how you ensure that enough revenue comes in. Wordpress' Tumblr problem is that costs exceed revenue, not distribution. Note that "decentralized" doesn't reduce total costs - it just spreads them out. Server costs do not go down with the number of owners.