The only problem with that is that the download number is reset to zero if a new version is uploaded with a new identifier.
Aye, there's the rub. Forgot about that since I always keep the same identifiers. That basically nullifies the idea.
Also, worth stating that just because something is popular doesn't mean it is any good!
Sure, I agree with you, but I still think that popularity is a kind of measure regardless of quality. It might have been interesting for newcomers to see what OXPs most people are using and that's a metric that's quite often used for this type of thing (think of plugins and extensions not only for games but also for software in general. Atom is a good example). But the identifier thing basically kills this discussion