I understand Blitzkrieg's logic completely. He's saying:
You download it to try it, not because you like it. Because if you liked it, you'd probably have it, therefore meaning you don't have to download it.
So unless someone accidentally deleted their copy, and wanted to still have it, all of the downloads of every map/mod is from people who haven't tried it. Unless of course the map creator(s) download spammed it to get marks...
And just because you download and play something doesn't mean you have to like it.