A lot of people like the ads. The un-skippable is what people don't like.

Seriously?

While I sometimes enjoy watching trailers for other films in the "bonuses/special features", when I buy a film (whatever the price), what I want is to watch the film:

I put the disc in the player, I press play a couple of times after I chose the spoken language/subtitles, and then, I watch the film.

Even if you can skip them, I really dislike the sequence of trailers, ads, "FBI WARNINGs", more ads, "enjoy the full experience of ULTRA HD", THX deep note, yet more ads.

I have an old Disney DVD with a feature called FastPlay. It has a 30 second, unskippable, description of FastPlay.

They might be fine the first time you watch a DVD, but when, later, you see outdated adverts every. damn. time? That's actually the exact thing that made me abandon DVD's years ago.