I think the whole concept of companies providing free sites that everyone can put out all sorts of personal information about themselves is primarily for the financial benefit of the media companies.
These companies gather and sell information and some people actually believe their information is somehow "private".
Facebook is free for a reason. They don't have to charge you anything to have an account. They need you to visit fequently and no cost improves the odds.
Then, people "socialize" and information is gathered and processed ... and sold.
I wonder how much they make on the average social media account over, for example, ten years of information sharing.
Any idea?