I think the only way they can possibly do this right would be for it to be dynamically adjustable, based on and factoring how old the game is and it's current market value.
People saying 30%. Let's say you buy at $60, so that's $18 back by default. A few years later, the game is going for $20 or below. Would it make sense for them to still give you $18 for it? It's on sale for $10 during a wild Christmas deal. $18 still?? You could sell it and rebuy it and make money at that point, lol.
Let's say that game is Madden 25. Would Gamestop even give you a dollar for it at this point?
50% makes that sound even crazier. IMO, it's got to be a lower flat rate or dynamic to make any logical sense from their perspective
I'm assuming they are doing this with the assumption that people aren't going to just go around flipping games as right away.
Why would a deleted game benefit MS?
Why don't they just offer 10% off your next digital purchase with every game on the store? Same difference really
You could stack money, you can't stack 10% off coupons.
As for benefit, it would be money in your Xbox Wallet that can only be used there. Just like Gamestop, it could spur other purchases... like DLC, movie rentals, more games, music purchases etc etc