Originally Posted by
MSPeconomist
OP should note how DOT defines an IDB. It's not just a matter of not being allowed to board the plane.
How would the OP know if the flight was oversold?
Personally I would contact customer relations and spell out the facts and ask them to investigate. Ask for reasonable compensation. If the EQM missed are essential for status, make it clear you want those.
If this does not lead to anything in a reasonable time frame (10 days), file a DOT complaint. State that it may or may not have been a case of IDB (they can work that out), but certainly a violation of the CoC.