Code didn't work.
Sent 4 3 month game pass ultimate codes, only 3 of them worked; Microsoft's website said that the retailer had to activate it. Spoke to customer service who were completely unhelpful and just repeating 'tHeY'rE aCtIvAtEd' - yeah, not by me though, clearly. I sent screenshots of my MS account history and of the page rejecting the code but they didn't care. I want a refund. You can have 3/5 stars since I got 3/4 codes.