I canceled Prime about 18 months ago, and now every single time I go to check out on Amazon, before the checkout page there's a splash screen a the gigantic, bright blue CHECK OUT WITH PRIME button, and then under that, in 8pt font with grey-on-white text, a "No thanks, continue without Prime" link. The lack of any subtlety would be hilarious if it wasn't so irritating. Throw the book at them.