I've gotten 3 of my accounts to 99 mage autoclicking 10+ hours a day and have never been banned. They also introduced new mechanics to ardy knights to thwart auto clickers, they probably had a hard time banning them?
Idk about the whole high ban rate, but go to Druids in Ardouge and you'll see bots in every world, and I don't mean throwaway accounts, majority of them are like 90+ str/att. Someone probably is running their own private script.