Availability and what is available for purchase are two separate things. Airlines may choose to block inventory for yield management purposes, for example, which is impossible for Expertflyer to verify. Stop making the false connection that what you see in EF equals what is available for your RTW ticket. We all recognize that these tickets can deliver value that outpaces buying point to point tickets. Why would the airline allow all of the available inventory to go to these discounted fare products? There are many types of discounts in play for airlines and they have to figure out what maximizes their revenue and fills their planes.