https://www.usaa.com/my/car-buying-selling/faq
Yea it was (is?) run through TrueCar and they announced earlier this year the decade-plus partnership was coming to an end.
What is the world going to do without discounts like this?
Wait, never mind, I can still go through Costco, and I’d only have to give up the extra $100. 
I’m assuming the $250 for a BMW lease is going away as well? Glad I just opened up a PenFed account.