Originally Posted by
Rami Tamimi
Yes,because AA has to explain to QR why they (AA) let a particular passenger to the lounge. Sometimes they swipe the card,sometimes type the info in,sometimes write it down.
Himeno is correct. (although there are perhaps nuances and differences depending on airline and location - I can't speak for all).
But at the OW airlines and lounges that I am familiar with - operating carrier pays when access is granted based on COS and FFP pays when access is granted based on FFP Status.