That on its own should give you pause. But that data is then used by companies like Facebook or Google to allow the highest bidder to alter that users behaviour - by getting them to believe some propaganda, to vote for a political party, or to spend money on something they don’t need.

That’s the business model. That is how you make money on your site.

There are other ways of making money – I’m sure that had ad revenue not been available you would have found a different way.