Well, I think it's safe to say that your mom sacrificed a lot for your family. And, really, what is this, but just another sacrifice. And if you don't really use Facebook, it's a pretty painless one, at that. You end up resorting to doing whatever you can. If you're desperate enough, you do end up compromising yourself and make that sacrifice for your family, so that one day maybe they can have something better.
And that's really what's happening here. These companies are feeding on the folks who don't have alternatives and are desperate for whatever they can get. Personally, if I were in that situation, I doubt I'd even have a Facebook account, but it's strange times.