I’m with you; github is my social network. I love that their business model is about supporting open source products but providing infrastructure for pay for companies that need privacy. That way, I’m not a product, my work is shared with the world, and they get to make money.
These companies are too big to fail. You can't fight with cancer by slapping it on the tendrils with fines.
If you can't cut the cancer out then cut yourself from it. The effect is comparable (if we forget about or actively fight shadow profiles).
FB, Twitter and other social/media companies are for-profit and your persona is the currency they're after.
But hey, at least we'll get the perfect brand of socks/bed sheets/mattresses in the ads we're served.