An important difference that Nielsen doesn't have an agreement with Vizio that they broke and the "protection" being Vizio terminating their end of that agreement as a response.
As much as I dislike Apple, its amorality, its attitude towards it users, its effect on the markets it's in, etc, I don't have any disagreements with Apple's actions here: Facebook/Google violated their license, so Apple revoked them.
But the terms of this license are by no means "protecting" users who voluntarily chose to install these apps for payment. A license can have multiple legitimate purposes, including protecting the business interests of the licenser. There's no need to pretend that Apple is protecting users in order to defend their actions here.
Indeed. The violation here really has nothing to do with protecting users, as you say, it's more of a positive side-effect. On the other hand, if it weren't for that aspect, the press-coverage that sparked Apple's revokal would most likely not have happened.
Apple found themselves in a position were doing "the good thing" aligned with business.
