I noticed the same thing but I think that there are tons of games hosted at once, mostly those BGN stuff and people just spread out in them, you know? It's not like theres, say, 20 games to choose from. there's like 100 or so and they don't even appear all at once. What really shocked me is that only about 40% of the hosted games are DotA, mostly because those BGN bots host all used-to-be-very-popular maps, tons of those.