IATA Director General Giovanni Bisignani says Amadeus, Sabre and Travelport’s Galileo and Worldspan deserve “a special place” on IATA’s “wall of shame,” largely because of the fees they charge airlines for each GDS booking. “They are leeches, charging at least $4 per transaction, when China’s TravelSky does it for just $1.20,” Bisignani said.