Yes. It's obnoxious.

I think it hides the big ad area if it can't get the data, but I haven't used my Roku outside of the setup in so long I don't know what the UI would look like.

I've done this on VIDAA (Hisense) and there's a placeholder for the homescreen ads that just say "VIDAA".

In some cases. There is a blank square on the main menu. The idle screen also normally had an ad. The idle screen looks like a scrolling cartoon panoramic shot of a street, and the ad is a billboard on the side of the street. That billboard simply isn’t there at all if the ad is blocked.

On my parent's it doesnt render anything at all. Just shows the wallpaper.