It's pretty simple (let's hope I get this right I'm winging this folks)
Airlines only have to pay damages if they:
a) File a claim (injury, etc.)
b) a passenger is killed and the damages go to the family members
There may have been payment to some on board the flight, but if nobody claimed injuries and such there was no payment (there may have been free flight vouchers at least
Cause of the accident eventually fell to the airline due to clear ice that formed on the upper side of the wings, and SAS' procedures were deemed inadequate. The clear ice broke off the wings and were ingested by the engines, which caused them to flame out and the plane to crash.
Head in the clouds... yet feet planted firmly on the ground.