They should just do what everyone else does and finance themselves by selling your data to the highest bidder! There are lots of advertisers who would pay a fair amount to know this much about your social graph and what you think of them.
You say that as if they won't anyway.
>The site does not currently and will never show ads. It also does not, and don't intend to, sell data to a third party, with or without your consent. We are just against this. Fuck ads.