I mean, in this way we are basically giving data to every big company, aren’t we?

Not necessarily agreeing with you, but I noticed something similar. I can’t remember why I was logged out of the official Reddit app honestly, but I was, and all day yesterday I’ve been getting “suggested posts” and all of these were from r/amiugly, which was weird as hell, especially (again) considering that I was not even logged in, so there was not any sort of algorithm magic going on. I don’t know the numbers for that sub so idk if it’s just popular, but this is something that I noticed too.