Hey there, I'd like to leave a suggestion: Why don't you have a textures-folder? A lot of awsome stock pictures are in the flat-textures category. It's not a rare thing that the textures make photomanipulations really stand out from the rest.
I'd love to know if you'd like to affiliate with my group, which is for commercial-friendly stock, to help those artists who are looking to sell their artwork outside of DA!