Most scrollers do it mostly as a hobby or for some extra cash to put back into their hobby. I think it would be extremely difficult to break it down into levels of expertise especially since a lot of us focus on one area of the hobby or another (portraits, puzzles, fretwork). It may just be me, but I would have little interest in putting a label on my hobby. I'm a scroller. I do it because I love to do it and if I make a few bucks at it so my Wife don't cringe at the costs as much then I'm happy. Interesting topic though, I'm interested in how others look at it.