I'll look forward to seeing all the Halloween customs! I wish I could participate, but I don't have 10 feedback. Won't stop me from making a Halloween custom of my own though!
Perhaps you could do a private custom trade with someone? That's a great way to build some feedback and swaps are always great fun, whether they are group swaps or 1:1.
I wish I could participate, too. I've done a Halloween swap twice and those were always some of my favourites. Sadly I don't have enough time in my hands and there's still some previous commitments I need to fulfil, I would feel bad to take on any new ones. I'm very much looking forward to the results, though!