I have recently been having a look on deviantART and red bubble and recognised some APers work on them. So I am curious about what others think is it worthwhile posting works there? I doubt anyone would be making a living out of these sites but is it worthwhile handing over the responsibility of printing and shipping your photos while making a smaller margin?

Also, what makes each one better then the other in your opinion? For instance I noticed on one of them there is an option to download full res digital files, can that be turned off or is it part of the teasnseas?