How do GDS (Sabre, Amadeus, TravelPort) offer best prices than airlines and hotels?

There are 4 GDS systems in the market, and all major hotels and airlines have connections with them, either through their own systems (the Hotel/Airline CRSs) or through intermediary integrations like myallocator (a channel manager that connects CRSs with GDSs). And he’s also correct that they sometimes have lower rates. However, consumers don’t interact directly with GDSs, GDSs are used by business and independent travel agents, who also need to make a commission. (www.aviationrepublic.com) Plus d'info...