"But in my experience, the airline backend and pricing is usually outsourced to Sabre or Amadeus"
True, but that doesn't make the reservations visible in the GDS. If Sabre or Amadeus is running your "CRS (Central Res System)", they aren't allowed to do anything with the data that you haven't asked them to.
True, but that doesn't make the reservations visible in the GDS. If Sabre or Amadeus is running your "CRS (Central Res System)", they aren't allowed to do anything with the data that you haven't asked them to.