At the risk of troll-engaging: there's a huge difference between using an independently-auditable, multiple-contributing-entity, open-source library that happens to have been originated by a social network's engineering team, and using the identity-tracking public APIs of a closed social network. And both can be useful in certain situations. Be wary, but don't close oneself off to good technology just because it's associated with technology you disapprove of.
OSS can of course spy on you. You just have a reasonable way to audit that software, and find that out for yourself.
If you can audit it yourself, why not use it? I won't follow you on your quest to rid yourself of things created by corporations that I find to be evil.
It's your opinion, sure, but using a corporation's tech does not ensure positive publicity or good will.
Only when your needs align with theirs. Which, truth be told, is fairly common. But they have a tendency to ignore or give low priority to other people's needs, like certain features that don't meet "Facebook scale" or, just, documentation (see: Relay).
I beg to differ [1]. I know people at Facebook, and from what I’ve heard, people just kind of... do stuff; there’s very little organization. Maybe that’s not true anymore, though.
So it collects your personal information, even when not using it, and uses it for profit?