That's my point though. Not everyone has access to CHDBits, HDBits.org, HDChina, etc.
Certain
trackers have a high rating from what weblink you posted, not based on quality of their work, but because of how difficult it is to become a member there. BeyondHD and Blu-bits do great quality 1080p
HD encodes, both
trackers compared to CHDBits 1080p encodes. (This is just from what I've seen people post samples of.)
I don't know why
HD-Space wouldn't be good enough as
proof. They have over 9,000 pages of high definition material that has dedicated seeding around the clock. Anything from scene groups, to HDBits.org work,
CHD's work and even work from their internal group HDSpace.
If you do a Google search, you'll see people can cheat on CHDBits.
If you're that concerned about not wanting to invite a cheater, then
seedbox proof is all that would be needed, as it would be cheaper to purchase an invite than a
seedbox to show-off in trying to gain a
SCC invite.
Not everyone gets to start off at a place like HDBits.org and it's good that places like
HD places like Blu-bits are open, who do their own internal work, so people can start somewhere to prove themselves for something else that they might want in the future.
Sorry for the rambling, but I felt like this giveaway has discrimination attached to it.