Yes, there is ton of artwork and several good artists that do a good job promoting gimp. I belong to several dA GIMP groups and see fresh stuff people do all the time. We dont integrate it into our site, because we prefer to keep gimp.org
lightweight and easy to serve. We dont have a person for patching and hardening and maintaining a more complex web platform and compromised gimp.org
would be a very bad thing. We may post some more awesome works here on G+ tho in the future.
Now, asking us to make you a free photoshop is something I personally find accutely rude and distateful. There is no satisfaction in creating a mere copy of something else. Not only that, I find it rather like making a cheap chinese copy of brand name items and profiting from it. Theres a name for that, thats called counterfiting. If you want a free copy of PS, pirate it.
Contrary to your belief, opensource graphics community is quite tightly linked. Once a year we meet at LGM, talk shop and see what other projects are up to. Most projects fund their developers travel to this meeting.
So... shooting ourselves in the foot? Maybe. But probably not. On the other hand, you seem to know what needs to be done. How about stoping with the pitty, and doing it?