I hate their DNA.
I have a general rule, that I do not judge people on things like ethnicity, gender, sexual orientation, and other things that they are born-with and are beyond their control.
In this case I would have to make an exception.
Those two days of work for a hacker are followed by months or years of worrying which of the 40 odd jobs the FBI is investigating. I'd imagine an honest job provides a more enjoyable income than one in which you spend the following 7 years hoping the SWAT team doesn't boot your door in.
That's probably why sustained-effort hacks are called off after a fairly short time, assuming that the article is correct. Even if the FBI or other law enforcement had full authority to go to each compromised system in-turn to analyse the connections to keep tracking back, there's still the issue of finding the owners, finding the system admins, possibly going in to look at paper records for credentials for systems that aren't commonly accessed, analyzing logs, etc. Quite some time will pass for the investigator to work back to the origin, and if the hacker stops and manages to obfuscate his trail several hops out, they probably won't reach him.
Writing software is more fun than working.