Nintendo allowing cross-platform online play with Playstation, Xbox users

[DélioPT]

DietSoap said:

DélioPT said:
If this applies to the retail games, there goes the fear of buying, for exemple, CoD and not having a online fanbase to play the game with.

Which is exactly why Nintendo did this and why Sony/Microsoft won't. If the tables were turned and Nintendo had the majority core online audience while Sony/Microsoft had very few, you'd see them attempting to leave online players off Nintendo and Nintendo refusing.

I understand.
But can they refuse even when the game is beeing played on the developer`s dedicated servers?