Actual, factual data from MS, states GP is costing them sales.
Not just MS, although their admission in the CMA hearing that Game Pass hinders sales was damning considering they had spent years prior trying to claim the exact opposite. I seem to recall Square-Enix pointing out that sales of games like Octopath Traveler and Outriders were utterly abysmal on Xbox platforms compared to others. What's the common denominator? Both got dropped on Game Pass day one when they launched on Xbox platforms.
FF7 Crisis Core came out on all three platforms and did the worst on Xbox.
"Game Pass when? FF7 Remake when? Waaaaaa." - Xbox users.
I'd love to see some actual sales figures for a game like, say, MLB The Show which has consistently dropped on Game Pass at launch. I bet sales are almost non-existent on Xbox platforms and probably also has the lowest rate of add-on purchases (stubs, packs).