Is there any way I can credit the miles earned on a SIN-TRZ-SIN Indigo itinerary to any of US carriers? AA says "You can’t earn AAdvantageŽ miles or earn Loyalty Points on IndiGo flights purchased directly from IndiGo (flight numbers beginning with ‘6E’)." I'm not sure how frequently I will be flying with 6E in future, so I'd rather have any points earned credited to some US based airline.