They are not flying at a profit. They are simply trimming the loss they take on shipping compared to paying someone else to ship it. For Amazon, shipping is a cost that needs to be reduced, not a profit center. Sure they could take on outside business to fill unused capacity, but I doubt they are willing to subsidize it. Time will tell, but although I expect Amazon to expand its logistics business in the near term, I don’t see this as a long term good fit for them. In any case, as a pilot, I care about an expanding pool of good pilot jobs and am against the regional contract model making significant inroads into the express shipping industry.