If you read the page, it says 'from our partners' thats not recommended, thats sponsored, it has nothing to do with the TOS at all.
The devs well know there will be plenty of people acquiring or about to acquire mmo based peripherals, why would they restrict it, and yes, the hardware does give a massive advantage over users who dont have such devices especially mmo mouses, they even give users a larger advantage over controllers even more. but such devices are considered pretty standard by now and id imagine even the devs like yoshi having a mmo based mouse.