there are tons of topics where developer's says their account has been disabled by google admob and they are not event replying but that is wrong few days ago my company's (not actually mine but on my day time job) account has been blocked and i had sent 2 emails to admob team to ask the reason and if possible then reactivate the account and today they had reactivated that admob account so yes admob is safe and google guys are good persons.
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https://support.google.com/admob/contact/disablement_appeal