It sounds like from the article that what Vizio is adding is a way for content providers to add interactive ads to their programs. The content provider decides where and when the ad will be shown.
How will the content provider know that a local EAS encoder has been activated? The EAS message is flattened into the video that an advertisement would/could cover. The example image of the jump ad in the article is covering the area that most EAS encoders provide text.
Given that EAS has an incredibly specific tone (that is illegal to broadcast) it shouldn't be hard for Vizio to just detect the EAS tone. I don't get why everyone is pretending like Vizio can't account for a very simple and common edge case in broadcasting.
Imagine a hearing impaired person not seeing a message that a tornado is approaching their immediate area.
Hopefully it's just a poor attempt at an April Fool's joke, and not real.