Benefiting From Free/Permanent Free Books?

My Question: Do you feel you are subsidizing the reading habits of a small portion of readers when offering your e-book(s) for free?
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There are lots of pro’s and con’s regarding free books. Authors are discussing this topic since years – just look at the KDP forums, this thread for example: “Do not give your book away free! EVER”.  There are eight pages of opinions about this topic.

If you wrote only one book so far, it does not make sense at all to set it up for free.  But after the fourt...