[yafujifide]

None of the federated social networks integrated p2p payments because that wasn't possible until bitcoin. The entire existing internet economy was built around the assumption that p2p payments were impossible. That assumption no longer holds.

[Animats]

No, the early Internet economy tried micropayments. First Virtual, Cybercoin, Millicent, Digicash, Internet Dollar, Beenz...

All failed.

Anyway, payment isn't the problem with distributed social networks. Asshole amplification is the problem. If one jerk can easily annoy hundreds of users, there's a problem. Trying to build a federated social network which can survive spam nodes is going to be tough. Especially if users are anonymous and can create additional identities easily.

[rakoo]

What's preventing all those systems to integrate p2p payments now ? AFAIK users only need to share their wallet id, so it could be as simple as a line in the profile; when users click on a "tip this" button, the system can get the id and send some amount.