You discourage the establishment of Counter-Strike map sites. AQ2 was extremely inaccessible in my opinion because of the map situation. There was no standard. People wanting to play AQ2 would have to download megs and megs of maps just to play on any given server. For CS we've tried to change that, and I think it's worked quite well.
People can ultimately do as they please with the mod and maps.
However, we just don't encourage maps sites or delegate one as official. People are mostly thankful for the screening process we do with maps. The system only encourages quality maps. But it was a simple case of seeing what worked, and didn't and learning from that. Today's 240 Seconds of Gaming over at AGN has a feature on Counter-Strike.