Originally Posted by
safra1
If I am TK *G and I use that status to enter a UA lounge, does TK pay an entry fee to UA for my visit? Also, if I credit my flight on UA metal to my TK account, does UA pay TK a fee?
In effect, yes, though these are generally not direct payments. These costs get accumulated across the alliance and reconciled as batches. So, if 100 TK*G members use UA lounges, and 100 UA*G members use TK lounges, it's a wash. Throw in all the other members and lounges, and it can be a bit of a combinatorial explosion.