Originally Posted by
Often1
..Worth noting that VDB credits likely cost the carrier 70-75% of their face value and some industry analysts suggest that less than 50% of credits are ever used. That may mean a cost of $0.35 on the dollar. Or, a $600 VDB averages 210.
These are scarily low numbers. But then I recall how hard those vouchers were to be redeemed

.
UA has always refused me cash compensation even once for a flight originating in Europe. Of course still being greedy for upgrades and the likes, I did not push it further than several angry emails to CS.