Find a good method, it's a lot of trial and error to find the right way
You can always take a look at my script available (and join my discord for support):
https://osbot.org/forum/topic/66292-khal-scripts
Hmm that's pretty quick to get a bann, but older accounts usually have higher bann rates.
Somehow the detection system catches on on them quicker, probably bcs of the change in behaviour from 2y ago to now
Enjoy!