Technically..... no.

As you are aware, you need a third party software in order to use PS4/XB controllers for the game on the PC. If it is used to in that same way, i don't see why it would be against the ToS. If it is, then players using controller on PC should get hit the same way.

That ToS thing, its mostly to for those using third party programs to cheat the system and harass/grief players. Why do you think Yoshi said to keep a HUSH HUSH on parsers. Use it, just dont abuse it.