I agree that something needs to be done.
A separate thread would work. It would be specified that it would be for POSTING freebies only. No discussion, follow up, etc. One post per freebie, in the thread, great. It would work, all would be well.
Or a different forum... which no one would read. I honestly kinda like the freebies, so I am leaning toward the single-thread idea over the separate-forum idea.
Cheers,
-Dave