Maybe they think that MoHAA is going to be the next CS in terms of online players.
For now it's not even close, but who knows what would happen when the full game comes out? Sure a lot of people dissed the demo when it first came out, but more are dissing CS, and people keep playing it even though they badmouth it to death on public forums.
http://www.gamespy.com/stats/
Personally, I would see MoHAA below halflife but kick the shit out of RtCW in terms of player numbers. More people are playing the demo every single day, instead of less, and that tells you a thing or two
