That is how expert hackers and scammers are.
Hackers hack computer systems for knowledge and fun. Not for profit or damage they can cause.
These were just filthy scammers. Bitcoin is early stage and when there is bubble growing huge masses of non-technical people coming in.
They often fell victim sadly.
I can't agree with that. For majority of hackers the motive is money. What do you think, what they live from and how they finance their activities? Yes, some do that for fun or even for politics or ideology but many are motivated by material goods. Bitcoin is not exception and it's very convenient because it's not so easy to trace it and despite it's not the same as on the begininig it still has a great deal of anonimity.