We're actually voting for the piece - if we vote strictly for the Artist, we'd have to limit it to one image per artist for the sake of fairness, then we end up with only five or six entries per month. This way, at least we get a larger selection of images to vote on. In actuality, this makes it more an "Image of the Month" contest, but "Artist of the Month" just sounds better - and the T-shirts and Mugs are already printed with that text.