I have it on very good authority that APNG have lost a number of big contracts (mining companies) that the Twotters were used to service and now they have no use for them so have/are selling them off.
Many pilots getting the 'move along' orders and the ones that were lucky enough to stay are getting upgrades to the Dash.
APNG seem to be in a bit of a restructure stage, trying to stem the bleeding as they say.