"Awww man, the dominus hat is too expensive."
"Wait a second..."
*creates a copy of the dominus hat, retextures, puts up sale for 1 tix*
"Perfect."
No support.
Three things we know for a fact:
1) User-created stuff WILL be coming.
2) It will be released some time after R15 (which has been released).
3) It will be a heavily-moderated process, so no Dominus copies.