Kindle Unlimited is less than $1 for 3 months for Black Friday: I just signed up

Many of the Black Friday deals we've found on Amazon are for devices. We've compiled a giant list of the best deals available on Amazon, and just about every single one is a physical product you have shipped to your home. Then we were slapped on the back of the head by this one: you can get three months of Amazon's Kindle Unlimited reading service for $1.