Premium Members each receive 5 Power Bombs every month. (they do not rollover to the next month if you do not use them.) They can send a bomb to any Free Account (cannot bomb premium members), and you cannot send more than one bomb to the same member.
Once a user is bombed, they receive 1 point of damage. If their damage goes up to 10, their account is suspended for 15 days, at which point they will be unable to access their account. Damage points also get reset once a month.