It was maybe not really used on 360 so that they think that it will be used even less on Xbox One.
Games on demand has 3 original Xbox games in the top 300 on the 360 marketplace. Halo, Fable and Crash Bandicoot and Halo is the only game with at least a decent place. It doesn't really seem as if people really care about it even if you see many on the internet talking about it from time to time.
Not even San Andreas is in the top 300 on 360 and on Xbox One there would be maybe 0 games selling at least more than a few hundred units...







