I do use bots that help me downgrade ugly chorse like log stockpiling, boards/blocks etc. On other hand I'd never use curio bots probably, if for nothing else, cause I just don't need them. Honestly I think bots that autofarm put people in much more advantage than curio bots, thats why it doesn't bother me so anyone would use them. (simply cause you can kill them)
As for assumption, maybe 80%+ is bit too much, but certainly I'm aiming to that number because of few things, like being in many factions that did use them, knowing buddies that use them, people that ask me for some advices and use them, union client being released, other clients being released (kens + rizen) and lot of people asking there too.