Originally Posted by
flymexico2010
Yes,they bill that airline.
However they want to force people to credit to FF from which they use the advantages like lounge access,free baggage,economy plus seat for example.
That sounds like a change that would be driven by the other *A airline, rather than UA, then?
When crediting to UA, they don't have to pay another airline for FF points, so I can't see a reason UA would care if you use another *A airline's Gold card to enter the lounge. If anything they should encourage it.