Hi, many thanks. I have read a lot. I would like to confirm the following is (still) the case.
(I performed all the recommendations and avoided updates or registering. )
If I want to run the kindle app I would need to register with Amazon. Further, by registering with Amazon the tablet would likely start receiving ads and other bad stuff.
Is this correct?
If you've already setup the tablet and shut off OTA updates, then you're properly setup. If you disabled Kindle in Manage Amazon Apps in Toolbox, then you'll need to restore it. Also you'll need to enable Shop Amazon so you can sign in. Signing in does not re-enable updates so you don't need to worry about that.