So, what's the benefit of using these ones that require invites over ones that don't? Cyberpolice can get invites too so I don't really see how they're any more safe... I guess it has to do with private trackers or something like that? Admittedly I don't actually know much about torrents.
I've always just used torrentz.eu; I usually download from monova but I'll download from TPB if it looks like the best option. Feds haven't broken down my door yet...