"but if you don't get enough hits they delete you. And they did :-( "

Actually, I'm glad to see that. Sems to me that the main reason that folks would prefer an artist's Wiki entry to his own self-promos (whether MySpace or a dedicated website) would be to separate the recognized/established musicians from the wannabes.

(And I'm saying this as the most small-time, half-hearted kind of wannabe myself...)

Despite Wiki's potential shortcomings as a completely reliable source (due to the editing-by-anybody policy), it is generally pretty objective, and entries can be expected to exist only for subjects of interest to the public in general, not just to the subjects' own selves.