Last month American Airlines finally changed its loyalty program, AAdvantage, to lock step with its peers and adopt a revenue-based model for issuing frequent flyer miles. It was an expected and yet disappointing change for many loyal AAdvantage members, who are still in the process of adapting to the new system. Just this weekend, however, American made more updates to reconfigure how flying with partner carriers accrues miles with AAdvantage — and many of the earning rates have been slashed. One of the benefits of flying a legacy carrier such as American, Delta, or United is the ability to earn benefits and miles on partner carriers from their respective alliance partners oneworld, SkyTeam, and Star Alliance. American, a part of the oneworld alliance, partners with over a dozen carriers such as British Airways and Qantas, and until recently it was possible to earn 100% of American award miles on every partner revenue flight taken. American’s new changes, however, effectively slash those earning rates for most classes of service outside of business and first class. The Points Guy ran a thorough audit on the upcoming changes and found that around 180 partner fares will soon have earning rates slashed from between 10% and 100% (with apologies to the passengers flying in Royal Jordanian “N” class who will now earn 0 miles for their flights). To read more at Skift, click here.