cctaylor
pfm Member
The overbooking is not just about getting double payment for seats as many people will be running behind schedule and have a flexible ticket so just take the next flight. The seat in the original flight could be empty and unpaid for so overbooking is about keeping them full.
I remember once LHR arriving early for an afternoon flight with BA. Asked at BA desk if any chance of getting on the earlier flight. They said flight was full but they would put us on standby and to wait nearby. In the end six standby people got on that flight. Presumably leaving six spaces on the later flight for people with flexible tickets.