I do not see that the situation has changed at all from the response provided by Andrew from dCS back in January to a similar request at the beginning of this thread:
"This is the issue. The total number of titles is still extremely small and although there is demand in terms of individual customers making requests like this, the number doing so is a small minority in comparison to our total customer base.
This feature is on our radar, but we haven’t defined its position in our roadmap yet."
Bluntly dCS are not going to spend the many tens of thousands of pounds necessary to provide access to a handful of titles from mainly little known artists on three boutique labels for a fraction of dCS owners.