This is not included in the terms I see (it redirects to specific terms for my country https://www.spotify.com/dk/legal/end-user-agreement/#s9)

However if I change the country id to "us" I get the same version as you, and I can see this new section 9.10.

If I google the new text, I find articles from yesterday about Spotify changing their terms in order to ban users using adblockers. So it appears that up until now, users has not had any agreement with Spotify that they will not block or circumvent ads.

I guess they are changing them incrementally. The terms changed for the UK last week (there seemingly was little interest from anyone). Unless there's something special in Danish law I'd expect yours to be updated soon.

Maybe not spelled out as such, but in section 8 under rights a user provides to Spotify, the ability to serve ads to you is there.

At least in the US terms. No idea for other countries.

See my other other answer about that. It's not relevant in this context.