From Jimmy Wales’s manifesto for the new, ad free, social network Tpo:

We spend your money on causes that you care about, rather than advertising.

And you help us spread the word. To help you do that, I’ve designed a whole new social network – similar to Twitter but better – and I’m hoping it will be massive.

So where does said money come from? Again, Jimmy Wales, replying to a question on Tpo:

Yes, social network open to everyone, funded by a phone subscription, but 10% of your bill also goes to the cause of your choice.