The thing I always noticed when a service places their own ads, is even when there are “ad breaks” on the timeline, the ads don’t always show up there. Or the screen blacks out for a few seconds, then the show plays, THEN the ad would play.

Granted, this was a while ago when I actually put up with that bullshit, so maybe it’s changed by now. But it was done very, very sloppily and is almost certainly a creator’s worst nightmare for the story.