To be fair to Meta, they did tell you they might do that. They didn't lie. They just told you in the find print of an already convoluted and arcane legal document that they know most people would never read, fewer would understand, and no one could do anything to change.

So unlike Tesla, where they did lie about FSD's capabilities, and that is at best false advertising but probably actually fraud, Meta at least had a thin veneer of plausible deniability against accusations of being liars when they sold your data to unknown third-parties because they did tell you about it, you just needed a law degree to understand what they were telling you.