There is an exploit that allows you to get free games and micro-transaction items from Battle.net. It involves using a fake bank account (registered to a bankrupt company). Blizzard will not be able to check the validity of the transactions as the company no longer exists in a timely manner. Therefore, you can use this exploit to buy every single game and keep them for a while. However, Blizzard will eventually ban the account (within a month).
So beware.
So beware.