I'm told that the airlines flying trans-Atlantic and trans-Pacific get the bulk of the RTW revenue. Not really fair, but those are the rules the airlines have adopted. So AA and QF are getting most of the money for your ticket, BA and CX will not be thrilled at doing the work for their benefit. QF does a great job issuing tickets and uses Amadeus so you can actually check your trip (http://www.checkmytrip.com)