RE: How many people shoot back tension??
I shot pure back tension for a couple of years to cure target panic,Carter Colby's with the rotating head.I hunted one season using that release and did fine.Definitely could be a little or a lot touchy though if your release is set hot!
I now do all of my shooting with a Truball pinky extreme,I don't trigger the shot with my pinky though,I lay my pinky on the trigger and the shot is triggered with back tension.Practically always on game once I am on target and my mind wants the release to fire,the arrow is on it's way.
The use of back tension likely saved me from exiting the sport of archery.