That's a good point, why are these guys doing this stuff illegally for pennies when there are probably plenty of companies out there who would pay them decent money for a proper pen test.
Probably because hacking into a gmail / facebook / twitter account is usually done by gathering informations about the victim by social engineering, and then trick the "lost password" form to get into the account.
Remember the guy whose macbook, ipad and iphone got wiped through iCloud ?
