Same with my Nvidia Shield TV which is aggravating.
At least with the Shield, nVidia wasn't the one that added those ads. It was Google. nVidia was put in a bad situation there, and I'm hoping they'll correct it soon.
Sony did too. I tried to bypass it by getting a relatively expensive nVidia Shield. It got home screen ads about a year later.
I thought that was Samsung. Of course it wouldn't surprise me if it was both.