My mother has:

* Got me a "BearSkin" jacket from youtube's incessant advertisement.

* Signed up for a $250 subscription to "The Daily Beast" when she was watching youtube tv right before bed and probably subscribed when she meant to just view.

* Signed up for Norton Antivirus when she got a gif that looks like a popup that tells you have a virus and it opens to a Subscription Plan on her phone.

None of these things were things she particularly wanted, some she didn't even consent to, but a combination of paid promotion / advertisement / confusion about the UI is basically doing things against her will.

I literally got her Youtube Premium just so she stops seeing all the ads that are feeding on her. It is a problem.