I have just removed almost 100 images from the gallery for non-conformance to the rules (thats about thirty percent of the images :( )
We only have one rule that relates to the gallery : images should not have a clear.gif over them. There’s a simple reason for this – it makes them very much harder to promote outside redbubble, to the extent that the few people here who are currently actually doing and reporting promotion probably won’t promote them, and it just wastes there time searching through the gallery.
If I have to delete further images from the gallery, the artist concerned is likely to have their membership terminated without notice, especially if they are also not reporting external promotion.
You have been warned!

The clear.gif image is pasted over your image if you select the ‘Discourage people from right-clicking or saving my images by placing a transparent image over the top of them’ option in your account preferences. the amount of effort it takes for someone to circumvent this is minimal but it is difficult to usefully promote the work in such a way that this ‘protection’ is maintained.