The big push in the rollout phase was around getting a lot of players to agree on a standard and hash out the $ flows for the tech etc. So my impression at time was again producers and also component makers were target of efforts and system design work.

Can DRM be used to offer certain things (all you can eat music for $10/month / tons of prime video for cheap)? Sure - and it can be used for that. Similarly with things like unlimited books. I have no recollection of any consumer protection promises - just that a variety of offerings might become available which they have.

Again though, some of the example promises might be helpful so we can discuss specifics.