In reality ABCBA is the exception, not the rule, so I can't see why we should implement this feat once again... It disrupts competition!
So in this scenario I can optimize my routes and use a single A330. It does not make sence to fly this with two A330s or B757-200,...The airline is not making any competition on the route BSB-BOG-BSB and all flights a compatible with the 2nd freedom.
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