this is a very good topic.

i think it is in any artists best interests to make dj sets/live PAs availible on the net. ive done it a few times now, listened to a dj set and thought to myself "this guy is good, i must check out some of their own material" if a dj is going to play a specific style, than more often than not, they are going to recreate that style to some extent in their own productions, and of course they may play some of their own material within their set.

as far as live PAs goes, then that is incredibly advantageous to the artist in question, its like getting somebodys discography or at least part of it thrown at you.

and then you look at it from a gig perspective. i bet many djs/PAs are booked just because a promoter listened to a set or two over the net.