I know there has been some difficulty with cross-platform compatibility, but to what extent I do not know.
But, just in case, try this. I don't know if this will work for you, but this URL is the page that immediately follows those terms. It should let you fill out the form and submit it to join.
Join Page
Edit: I just tried the link and it doesn't work.
I'll post the trouble on our Bug forum, see what the deal is.
Special Edition Saboteur:
Not sure I understand what you mean by 'RP enforced'.