Payment for one of the Connected packages is, as I found on expiry of my 3 year warranty, subject to whatever facility(s) you require from the UK Connected Drive store
(Link here:
https://www.bmw.co.uk/en/index.html).
I have the Connected Package Plus, which cost £99.00 for 12 months from 6/21 and includes USB Map Updates; RTTI; Remote Services etc.
So far as Spotify is concerned, I have the App on my iPhone and can link that to listen in the car through the Media section of the iDrive screen (have the App open first on your phone).
Spotify does work with id6 and my 2018 X1 cannot be upgraded to id7 (unless anyone knows better!).
Hope that helps.