This also explains why Facebook shows me wildly random ads for Viagra alternatives, yoga pants, conservative news, and better kitty litter than my current brand... All things which have no relevance to me, yet quite often triggering my urge to click "Hide Ad", but that too in itself is also a marker that creates a record I'm sure... What a mental health nightmare it's all turned into.
I log on a lot less to social media than I used to, and use AdBlock + UBlock everywhere ritually.