The first thing i noticed was a tweet of him. It said;"8021. Do you want to get many twitter followers. http://is.gd/9IMIW"
I clicked on the link and i came on this website http://www.twitterfollowersbot.com/ the first thing you see is the price list.
For "only" 50 dollar they promise you to get 500 followers on your twitter account. And for 450 dollar you will get 10 000 followers.