ACMIs have their good and bad. I think anytime a carrier comes in and tries to reinvent themselves and sell themselves as new and improved, call BS!! ACMIs do not generate their own revenues for the most part and are highly subject to the downturns in the economy and their contractors profit goals. All will take a turn at the top but the wave is cyclic and they will take their turn at the bottom because the major customer base (DHL, Amazon) are not loyal, and there is always a carrier willing to lower the bar just to get a foot in the door! Southern (737), Kalitta (767), Amerijet (757) ATI (757) Swift (737), Mesa (737) all took a swing and it was a financial miss dancing with DHL, so they left the game. The secret sauce, the carrier must be diversified.