That is not 2 separate buttons on the right, like I initially thought clicking through checkout.
Nah, next is, you must watch three one minute ads and answer 10 questions about the content of the ads correctly to continue without prime and there will be a captcha displayed under the questions, which will be timed out after question 10 and you will have to start over from video one to get another try. However, when the server notices your IP already got the ad once, it will throttle the bandwidth, so the video buffers every 3 seconds. When you finally made it to the checkout, some items became unavailable or slightly more expensive and you have to go back to the basket to update it.