The economy is not 0 sum. Someone else profiting doesn't hurt you.
> Exchanging private and personal user data without consent and without users being aware of it
It doesn’t hurt them, just lets us make better decisions, after all. There does not exist a good reason they’d object!
It's like when the internet made it possible to look up the price of good easily how it made it less likely for buyers to be able to lowball people. These price guides may be bad for these buyers, but it provides a more fair deal for these seller.
It’s positive sum from a wealth-weighted utility calculation though. And that’s why it happens.