Amazon does have the ability to remove downloaded items from your Kindles (assuming they sync with Amazon, of course); they've publicly used it before [https://www.nytimes.com/2009/07/18/technology/companies/18am...]. I can't confirm whether that happens when you chargeback, though.
No longer at amazon but I was in the appstore and charge backs were pretty common, you just lost access to the apps/iaps you charged back. Though I don't know what happens if you do it repeatedly or high value items.
And while they definitely deserve the ire for doing that with 1984, even in 2018 when I left preventing 1984 like issues were commonly brought up in design reviews, calling out 1984 by name.
