No. I've done several trades here before, but truth be told, I didn't even know about Feedback until recently.
I mainly use this site from my phone, and if you'll notice nothing about feedback shows up at all on the mobile site. There's also nothing on the site explaining how to give or receive feedback (and no one I've traded with has given me any).
I'm willing to offer the code first if the other person has positive feedback. Someone else said they wanted it, but I haven't heard from them since Sunday.