Learn more about some of the reasons for suspension:
Spam: Most of the accounts we suspend are suspended because
they are spammy, or just plain fake, and they introduce security
risks for Twitter and for everyone using Twitter. These types of
accounts are against our Twitter Rules. Sometimes a real person’s
account gets suspended by mistake, and in those cases we’ll work
with the person to make sure the account is unsuspended.
Account security at risk: If we suspect an account has been
hacked or compromised, we may suspend it until it can be secured
and restored to the account owner in order to reduce potentially
malicious activity caused by the compromise.