I seem to recall that Vizio was added to my "do not buy" list quite a long time ago, when it turned out they were monitoring your watching habit ( https://www.theverge.com/2017/2/7/14527360/vizio-smart-tv-tr... ). This seems to be more of the same I guess. Choice text from the link above: Q: Why did I see an ad in Scenic Mode? A: After Scenic Mode launches to full screen, you may see ads. We offer free, scenic conten…
I think every single smart tv manufacturer does this today.
At least I know LG, Samsung, Sony, Amazon, Philips, Sharp and Vizio does.
Since your smart TV is on your same domestic IP, there's a market for getting data on your watching habits to combine with your browser habits collected elsewhere.
The advertisers know more about you by now than you do.
That's why AppleTV is the best option for the moment.