I don't know if their newsfeed algorithm is broken, or just grasping at straws, but whenever I log in (fairly often simply for FB marketplace) my feed is full of posts and recommendations for things that don't even make sense for me. For example hiking groups that are in a random mid-size city 2,000mi from me. Or student housing groups in a random international city.

I've tried to even provide feedback on them not being relevant, but they still always appear. I don't know, it really does seem that their newsfeed relevancy is fundamentally broken