My facebook feed is the same way. Its based on browsing history and whatnot. Personally, I've leaned into it for the twin reasons of its stuff I'll never buy and I prefer being reminded that its shameful that I'm still using facebook at all. Apparently I'm addicted to daily blocking a new dozen or so people, pages, groups that I've never friended, followed or joined. That said:

$4 is plenty fair in my world.