You guys do understand that you can have 3 characters on 1 account? 1 Per region going at once? So as he stated... at 300gph * 24 hours = 7.2mil/day. 7.2 * $.50cents(much more likely if not slightly higher during his botting time)
= $3.6/day. 3.6 * 31 = 111.6 * 318 = 35.5k / month. NOW Factor in that he obviously had to have planned for this and been setting it up. It's quite easy to level a character to 60 w/ 0 gold/gear. Maybe take an hr longer then if you have gold... You may only be able to use your HOME REGION on that *1* account. He only needs to have 3 RMAH accounts, one on each region that he transfers to. As he stated there were 2 people doing this and there was never a point the bots were not being monitored. Meaning that assuming a person is there 12 hours out of the day its quite easy to get a lot done. During this period of time GF/PR gear was INSANELY cheap, now its worth NOTHING. I think 300 is a fair estimate if not slightly low.
