Photography monthly deal ! (United Kingdom) some info please?

Hello
I just checked their Photgraphy Deal (in UK)

I have a few questions directed to whom 'actually uses this membership deal in UK.

1. is Photoshop CC 'Latest version' FULLY downloaded to computer and updated/upgraded while on deal
i.e. Can I use it OFFLINE ? I do not need anything else really.
2. I see the offer includes 20Gb (Cloud data space I guess)? Not needed, as I use my own webspace if needed.
3. Is monthly deal part of a year contract or can I start it and interrupt any month and re-sign up any time?
It maybe just a sporadic use, as I can always use Elements for simple stuff.

4. I was also thinking to get a CS4 from someone that is not using it anymore - i.e deactivated and 'hopefully' Adobe does not stop re-activation on a different account - which would be quite immoral in my view but ... I see they do these things to push people on monthly payments - the new way!

To tell the truth, I would only use Photoshop for a few more oprions not available on Elements or taking too much time to do the same thing on elements.

For example, one option I may use a lot would be the Select/Color Range and the Modify I tried on other people's computers - to mention 2 of them and the actions etc. - that is it.

I had a Adobe account for about 15-20 years now and I used a lot of Dreamweaver/ Flash/ Fireworks at the time. Then not used them much and got Photoshop Elements/Premiere.

Just trying to understand what I actually get/how/duration of deal etc.

Thanks for your inputs
M