Who would they sell their Alpine High acreage to? Who wants to develop more gas in the Permian when it is being flared by other operators drilling for oil in the basin?
I don't think it is for sale. One big difference between the majors / large independents and other drillers is the former build infrastructure rather than hoping others will build so that they can hitch a ride. APA has the same problem that the Marcellus drillers had early on -- insufficient infrastructure. But APA is doing something about it as are XOM/CVX in their gassy Delaware footprints.
The best returns for NG likely accrue to the owners of midstream assets.