You Probably right but to as a start its very helpful ...maybe the 30% already gone but the 70% stays !! and still growing that's mean our way is working .
You should know more about growing accounts
70% remains cant be better if the account got ban for those 30% drop. Anyway, I do not want to go to any argument with you. I have a question why you are not responding to @examplens who has asked for a sample page which you have promoted and now there is 20k followers present.
See below as the reference:
Send me a link to your Twitter account (20k followers) I would like to test them. does it have any impact or is it just loaded with bot followers?
whether it is activated by a phone number and whether the registration email goes with it?
these account from 2013 !! proves Ban isn't option as long I'm following all rules !! yes 30% fakes at the beginning but later on it grows organic