1) Write a trojan / keylogger that you distribute via a fake "How to make millions of gold in WoW for FREE!!!!" websites. Just give them some basic mining/herbalism and dailies crap to fool the gullible, ie 50%+ of the WoW population.

2) Use your new remote zombie army to store all your data via the trojan.

3) Sell off the accounts and gold of 10% of your most unreliable zombies to pay for your new bandwidth requirements.

4) ?????

5) Profit.