No idea how long it will last, 5,000,000 copies available
There does appear to be a big BUT involved. All 30 odd bits of DLC for it says 'not available/applicable' with no method to acquire. Apparently they are preparing to release a new version that contains all DLC called Payday 2 Ultimate.
The people who previously bought Payday 2 are all pissed off at the developer now.
"I used to think the worst thing in life was to be all alone. It's not. The worst thing in life is to end up with people who make you feel all alone." Robin Williams