Thank you for the information.
As far as YouTube, Google and Ads are concerned, I use an ad-blocker, so don't see any of the Ads Google are targeting at me. I have to disable this on certain sites, mostly newspapers and commercial television channels.
So as far as Prime providing music streaming, that's also available on YouTube. I often listen to Mozart collections while I'm reading.
Although Prime's free and quick delivery is great, there is always the option of making the order amount to over £20 with items from my wish list. Though I hate having to do this.
My interest in KU was prompted by a book I was interested in which would have been free with KU, but I paid about £2.70 for it.
https://www.amazon.co.uk/MISSES-BRON...al-text&sr=1-1
Giving the matter more thought, I realise that the majority of my reading is public domain, so I could go for several months without using KU. I would also want to see more major writers on KU to make it worth bothering with.
Thanks.