OK here I'll weigh in:
1) REAPER must have contributed to the end result. It doesnt have to be end-to-end REAPER, of course.
2) Let's not go placing restrictions on whether it was licensed. Perhaps we'll prioritize registered users materials, but at the end of the day if someone without any money makes something and submits it, we should be able to use it (getting SOMETHING out of them). Nevermind that verifying licenses is tedious.
-Justin