Suppose I am a Star Alliance Gold member via say Turkish Airlines frequent flier program however my usual flight pattern leads me to use another star alliance airline, say Air India. Ergo I use Air India's lounges all the time.
Who foots the bill, TK or AI? Is there an interline agreement for compensation?
Just curious how lounge usage works.
What if there is assymetric use i.e. lots of TK gold members use AI flights and lounges but few in the reverse direction?
Does star alliance make airlines compensate each other for lounge use?