As far as I know it is a forum wide ban on all third party software that gives PlugY its bad name but there is a certain amount of hypocrisy in it. The SPF has been allowed to develop and promote certain utilities (ATMA/GoMule, RWM/RRM, various version switchers, run counters) without hindrance but there seems to be an ideological objection to PlugY. The funny thing was that you could use it if you were playing Median XL, but you were not allowed to mention the program by name; it promotes its use you see!! The most resent schism at the SPF really brought these (and more) issues to a head.