PAXboy: Upsetting people with denied boarding is not in a carrier biz plan, so they will always seek to minimise.
Unless, it seems, their fleets are full of N- registered aircraft. In which case they hand out vouchers for future travel like confetti to bribe confirmed pax into moving onto other flights - incidentally depressing their future yields in the process.
As if they haven't already found enough ways to depress their yields through other forms of pax bribery ...
