They already run ads for Disney parks, Hulu, ESPN, and other Disney owned content in the Premium tier. They just call them promos or sponsorships in the prior agreement.

The new agreement allegedly introduces a third term “advertisements”.

> We’ve clarified that all Service Plans may include: (i) promotional content, (ii) sponsorships, and (iii) advertisements before/after playback of Content and in channels, live/as-live, special events, and any third-party services content.

I say allegedly because I haven’t received any communication from Disney yet but various reporting refers to email people in European markets have received.

https://www.yahoo.com/entertainment/tv/articles/disney-putti...

I feel like they stopped doing that, but there was definitively ads for other movies and shows because some movies on Disney+, but I haven't seen it in a while. It was pretty badly done, because you'd get confused and assume you'd started the wrong movie, so maybe they rolled it back?

The quoted text is identical to what I have received in an email from Disney+. I only tend to get a month at a time when I want to watch a given show, but if paying doesn't remove adverts, I'm not going to pay.