In Direct Admin accounts can get suspended for various reasons. The account can be overused, the reseller can run out of resources or the account as been suspended by the reseller as it was hacked, the customer did not pay their bill or whatever. The default message that pops up on when you visit the address of a suspended account is:
This account has been suspended.
Either the domain has been overused, or the reseller ran out of resources.
But what if you want to have that changed?