Amazon has been unsurprisingly reticent about sharing data about their Kindle Unlimited program, a subscription system that lets you download ostensibly free ebooks, mostly from Indie authors. Nielsen research is showing that users who subscribed to Kindle Unlimited spend more on books in general, on a monthly basis, than those who do not.
Nate Hoffelder has done a bit of analysis and saw that subscribers spent about $58 per month on books while non-subscribers spent $34. Gender is almost split down the middle with women edging out men in subscription sign-ups.
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