I don't care if Google convinces some company to pay them while Google provides a service to me without paying. Of course they're going to try and monetize it anyway they can. I don't think Walmart has my best interests either, so there is nothing special about social media companies. Nor do social media companies have a monopoly on "spying" on their users.

I recall reading a case study over a decade ago about how a dad learned his daughter was pregnant because Target was sending her ads to register for a baby because she was buying things people buy early in their pregnancy like pre-natal vitamins.