I had to update my credit card recently. Despite being an amazon.com user for over 11 years, I had a really hard time accomplishing this task. At one point, I found a link to edit your payment method. When I got to the following page (shown here) there was a notice that my card was going to expire soon but no way to update my card or add a new one. Not even a link to where I could do this! Why not link the helpful “you may want to update your card” message to a place where I actually could do so?
I think I eventually added a new card by pretending to order something new – but it took a lot of time to figure out. Amazon.com could do better.