Even if I grant that for argumentssake, if I decide to purchase a WotC product t that looks interesting, I am neither formally or directly cooperating in their action here.
I don't believe it is possible to avoid material or remote cooperation with evil (short of living on a fully self-sistained farm in the woods) so I'm not going to dwell on it, even for toy and hobby companies.
I give far more money per annum to Nintendo than I do to WotC, but Nintendo as noted above will destroy someone's life if they commit software piracy, which I'm it a fan of them doing.