Seriously, this is almost equivalent to some kids that find someone's letters to their mistress and call them from their home number and demand money. Hardly worthy of the breathless "badass" FBI agent story reporting this article is full of.
If the guy had bought a couple VMs in cash and bounced around a few times and (for example) took Bitcoin and didn't spend it - then what?
The first time I've seen a blackmailer admit to the fact that they'll just keep asking for more. But psychological effects aside, it's totally idiotic to deliberately create more opportunities to get caught.
Please leave the poor, sensationalised writing to Wired and stick to the short news stories we know and love.
It's not all Ars fault, the FBI likes to make their mundane bullying look fearsome and cool. That, despite being the FBI and having the full cooperation of Microsoft, they still need to resort to physical violence to get some smalltime idiot blackmailer. Jeez.
They both got what they deserved, and it's more than laughable that their tracks were so clear. If you're going to be committing fraud, at least learn some shellcode first. Gotta start with the basics before you go baaaad ;)