Very true firebolty.
I mean, look at noweb, a friend showed me his videos and the Urban clan videos and from that point on i wanted to play and get good, and now after years of inactivity he's back.
Toribash always just lurks on your computer if you "quit", and 90% of people come crawling back at some point or another.
I know i have.

Back on topic (well more on topic that that), i'm not sure toribash is getting less people, i see new people ingame everyday.
And Solax made a very good point about the learning curve, it's so steep it just makes people give up a lot of the time, that's what happened with most of my friends.