I manage delegate.bitcoinjim (3%), more as a hobby/challenge just to see if I could get it working, tho I am an ardent BTS supporter and do my best to turn folks onto the system. I also am responsible for around ~1GHs of scrypt hashing (and a handful of X11) @ the pool.minebitshares.com pool. I also intend to contribute to 2.0 by running a witness node.
I really hope that even before 2.0 launches, we're able to continue to clean up the existing 101 delegates and trim some dead weight from there, and replace with active contributors. It does seem a bit baffling that there are currently over 20% of the 101 who don't publish any feeds at this point.