Seems they don't want to have our money... otherwise it would not be possible that after months it continues not to being possible to subscribe paid membership from europe. Seems the admin has not even understood that his strange paying-system is available only in US.... otherwise he would have written at least one post to answer.
It's since 3 days, that I try to subscribe for paid-membership. But there is a error in Paypal, seems to be a problem with your account...
Edit: Here's a screenshot of the error report (in italian, sorry):