Well, they tell me how many days I have read in a month now. Its a new thing on my kindle home page. I assume they could give me a lot more stats than that. How many pages did I read this month, or week.
I get recommendations based on what I read, not just what I bought. I get emails after I finish a book telling me what I might like after reading it.
I like all the stats and tracking. I have goodreads linked so it shows everything I read there. All my ratings go somewhere. They probably know exactly when and how much in a day I read. They know how fast I read. Wasn't that a thing with Kindle unlimited so they could tell if you fly through the book for scamming?
Honestly, amazon tracking my kindles and reading habits is the least of my personal worries.
I use google and my browser is synced over my devices. There is probably more worrisome stuff going on on that front.
I have always assumed kindles call home with all kinds of data.
I like the convenience of having it all in one place so I am willing to not worry about it too much.
I guess those that use kindles in airplane mode only, also use their computers in some incognito mode? Or VPN at all times? What about apps on a phone. banking, social media, GPS.
I am concerned about my eyes and if they hopefully can stay operational one enough so I can read all the darn books. Every single one of them.
I don't care if they know when or how or what I read to be honest.