Why are Rautaportti & Revolt.uk highly demanded ??

[jafer]

Can anyone enlighten me with information pertaining to trackers: Rautaportti.net and Revolt.uk?
I'm trying to figure why they're considered among the better trackers......or is it b/c people want them cuz it's difficult to obtain accounts there ??? I'll appreciate it if someone can reveal a brief description with info containing the following:

# of members?
type/content of torrents?
what's official lang. ? English?
forums ????

[jafer]

If these extremely private trackers forbid their members to reveal information publicly, I'd be pleased to be informed via P.M.

Thank You