Is that another scam?
I had a quick look through the source text for the page and there seemed to be some odd third-party addresses in there but they may just be the agencies used by the club. I took the view that a significant number of our season ticket holders won't be registered for online trading anyway so I might as well let things take their natural course. I can't see what any scammer would gain apart from a few season tickets. Does the registration process involve giving card details?