I think you missed the part where I said that it's not a guarantee.
Obviously, it's not a guarantee. They can still profit both ways. But if they have another means of profit, then there is the possibility that they're not dead set on profiteering on your data.
This is still not good enough for me though. Self-hosted or nothing as far as I'm concerned (Social Networks).
muyuu: Absolutely right (although, depending on the social network and how federation is handled they could possibly sell your data even if it's self hosted). If you know of any other good self-hosted social networks I'd love to hear about them. Feel free to email me; I may or may not see it in the deluge of comments here (see the about page on my blog).
Obviously, it's not a guarantee. They can still profit both ways. But if they have another means of profit, then there is the possibility that they're not dead set on profiteering on your data.
This is still not good enough for me though. Self-hosted or nothing as far as I'm concerned (Social Networks).