I think Amazon just picks things at random to advertise. Netflix has an excellent system that knows what I want to watch before I do. Amazon on the other hand just finds things. It's criteria (when it uses any) is less stable as well. Mean Girls may have high ratings among those who rated it, but the vast majority who refuse to see it much less bother to fill out rating info on it aren't accounted for.
It's kind of stupid with other products as well. I bought a printer so now it shows me other printers. I already have one, why show me more? Too late now so move on.
Nun sacciu, nun vidi, nun ceru e si ceru durmiv.
I know nothing, I see nothing, I wasn't there,
and if I was there, I was asleep.