Many deer hunter have used them.
Again...a small (by percentage) subset of the US population.
Deer hunters ... 10 million or roughly 3.28% of the US population
Stands via climbing harness vs stands via another method (ladder or climbing stand or screw ins) vs a blind vs something else common I'm not thinking of off the top of my head....breaks that 3.28% down even further. Sure "many deer hunter have used them", but it doesn't matter.
My point that it wasn't in 70% of homes/garages/workplaces still stands.
Source for 10 million number ... just a quick google search and that was the first result.
Source for population of US