By losing out on 10 million subs of revenue. Including the revenue generated by the token. It is more likely they offer a discount on the game pass for WoW subscribers. Like I said what you claim is unsupported by the ESO, FO76 and the other "subscription" games they may have acquired. Wouldn't they want to add the 2.5 estimated ESO subscribers to game pass? Or entice the non-subscribing players to get game pass? If it is all about boosting Game Pass subscribers then why pass up existing products?