I'd argue that most people would see the pop-up, dismiss it and then be unable to tell you what it said. People have had a lot of practice at ignoring things trying to get their attention, because you need that skill to get through modern life where your attention is considered someone else's property to be sold to advertisers.

It isn't enough to show people ads, the manufacturer needs to be able to bill people for the ads. They need telemetry and updated ads. Built in ads aren't going to fly, especially for the manufacturer's own stuff which they could sell more effectively by not being shit to use.