This is so horrendously wrong. I've experienced this on many different online retailers. I don't suddenly not want/need the product, I just go elsewhere. If a physical store I go to has their checkout system go down, I'll go elsewhere. Online isn't an exception to me, prior to this article, I NEVER realized that it was a possibility that my adblock was the cause. I just went to a retailer that didn't have a broken checkout. Going elsewhere is a more simple and easy fix than troubleshooting "WTF is wrong with this site?".