This is pretty gross and will most likely end up incentivizing GameStop to push Xbox consoles over PlayStation.
The first sign of this new revenue-sharing arrangement actually came somewhat hidden in a press release GameStop issued last week, trumpeting a "Multi-year Strategic Partnership with Microsoft." That announcement focused heavily on GameStop agreeing to use Microsoft's cloud-based infrastructure for its back-end sales systems and a deal for store associates to start using Microsoft Surface tablets going forward.
"I received an email from [GameStop Investor Relations representative] Eric Cerny and in the email he said, 'We are allowed to state we will receive a portion of the downstream revenue from any device we will bring into the Xbox ecosystem,'" Domo Capital Management President Justin Dopierala told Ars in an interview. He added that Cerny later clarified in a phone call that the deal applied to all digital sales on all next-gen Xbox consoles sold through GameStop.