I didn't see much pin trading going on at all when we went to DLP. In Florida it was everywhere, but the first I even realised that it went on in Paris was when I spotted some pins in the camera shop on Main Street on our last day Is it as popular at DLP as it is in WDW?
I've only ever seen people doing pin trading at tills when they've just bought something ... I keep thinking I'll start but it's another addiction like shoes, handbags, mickey mouse ears, etc, etc