That's a great option until you realize they can close your Amazon account for chargebacks, which in my case would mean the loss of thousands of dollars worth of Kindle books.
I've only bought ~10 Kindle books over the years because DRM, but had been getting more open to it. Then just recently they started delivering ads to the iPad reader as 'notifications' with a red icon that won't go away until you tap to see. They may think that's a minor new feature which they only use occasionally, and which their average user will appreciate. But to me it looks like the start of "I am altering the deal. Pray I don’t alter it any further."
I don’t buy ebooks, with a few exceptions mostly from Apple.
Check out your library system. My library has an amazing selection of books, usually available in EPUB and Kindle formats. If you live or work in New York State, you can get library cards in many libraries including NYPL. NYPL also lets you access Brooklyn.
I don't know if the new DRM that is applied to the books as they are on the device has been cracked, but there are links to download books to a computer (on the "Manage Your Content and Devices" Amazon page), and those can be unlocked by a Calibre plugin.
