If you deny Amazon the access to your reading habits you are not really hurting Amazon any. You are prepaying for the service, so Amazon gets their money anyway. It should be in your own best interest to let Amazon know you read enough of each KU borrow - in order to support the author. Otherwise you are not hurting Amazon, but deny payment to the author. Removing DRM should not even enter your thinking - especially to remove the DRM for books you did not even purchased, but merely borrowed under a library kind of loan. In that case DRM has every right to exist. But the again, Amazon would not care, you are only denying payment to the author.
P.S.: Assuming that a lot of readers will remove DRM based on a small sample of e.g. MR readers is far from the truth. The majority of Kindle users does not remove DRM.
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