Eurogamer have a huge update about this
http://www.eurogamer.net/articles/2...-xbox-one-game-trade-ins-will-work-apparently
Update: You, the shopper, won't have to pay the activation fee for a used Xbox One game - the shop will. Therefore, the price you see on a second-hand Xbox One game in a shop is the price you'll pay to be able to play it.
That's what a high-ranking UK industry source explained to me this afternoon.
The reason there's all this confusion is because Microsoft hasn't decided what the activation fee will be yet. The £35 figure reported in the story below sounds too high - perhaps it includes the shop's sale price as well.
My source confirmed that part of that activation fee will go to a publisher and part to Microsoft.
What this means for second-hand games is that Microsoft effectively controls how much they cost, because it controls the activation fee. Whether that fee will move up or down or diminish over time isn't clear. But it does mean second-hand games will probably be more expensive than they are now.
My source didn't know what Sony was up to but doubts the PlayStation maker will do the same thing, not because it's angelic but because it lacks the kind of pricey infrastructure something like this requires.