Let me be clear, the data you put online is as much a part of you as your physical being. It is a construct, but it IS YOU. Why should anyone own you but you? For profit social media is nothing but a perversely incentivized version of serfdom at best, but somehow permissible because your intellectual construct is believed to be somehow less valuable than your physical being. Both the physical and intellectual versions of you, are you. Deny them.