this is called exclusivity. this has been done for quite a few decades and since ms moneyhatted quite a few games last gen, people seem to be very distrustful. why dont you try to reason, why there is no pokemon or super mario game on playstation? or no uncharted game on xbox? EGS has a reason to exist: some devs would like to try out another platform, others only want to see their game being sold instead of being pirated(because GOG/steam seems piratable(i dont know if this is real, because i dont play on pc, but this seems to be a thing) another reason is that the EGS is a platform with nothing else than only the game being on display. or another store which does not shit out every game out there in existance. you could argue, why the humble bundle is not offering an option to donate the money to help refugees, so why do you argue in the same why against the EGS?