If I were a betting man, I would say the switch over to a revenue based system will occur on March 1, 2017. American would be wise to allow more than 75,000 miles earned per ticket as United and Delta limit miles earned at this level. This is detrimental to HVCs who spend more than $7,000 per ticket. This way they can go after some of Delta's big spenders and a few of United's GS clients. We just have to accept this is the future of earning miles and deal with it. At least American has not indicated minimum spending requirements will be in the future as you can just look at the UA/DL threads to find many who are so ever enthused about spending requirements for status.