I am a long-time user on both SCC and TB. I maintain an extremely decent ratio (with 600+ GBs uploaded, of which I have proof). I am looking to join a TV-series specialised site and I hear BitMeTV is the best of the lot (but let me know if you have other recommendations).
TB doesn't operate an invite system (and thank heavens for that). SCC has just disabled theirs (owing to some stupid schmuck who decided to profit by selling their invites on e-Bay) so I haven't got invites to offer until that changes. Edit: I now do have SCC invites on offer.
If any generous BitMeTV user is looking to add a contributing and reliable peer to the fold -- great, drop me a line. I will get you proof of ratio on TB or SCC and an invite to SCC as soon as they are made available again. Otherwise, just keep an eye on this topic, I will update it when the SCC situation is resolved.