Hi guys,
I realized why Pinterest banning our accounts.
It's definitely not Pinpioneer.
Pinterest send emails to every account owner's email and if they see that email hasn't been receiving by user or email is not exist, they send a warning to accounts on Pinterest Home Feed page such as "please update or confirm your email bla bla...."
If you ignore this warning message and don't update your email, that account get banned in 48 hours.
I realized why Pinterest banning our accounts.
It's definitely not Pinpioneer.
Pinterest send emails to every account owner's email and if they see that email hasn't been receiving by user or email is not exist, they send a warning to accounts on Pinterest Home Feed page such as "please update or confirm your email bla bla...."
If you ignore this warning message and don't update your email, that account get banned in 48 hours.