On this page there’s 4 highlights (view in Baymard Premium) outlining what Amazon are doing right and wrong.
(Tip: use the arrows above or on your keyboard to navigate all 969 account selection examples.)

The screenshot was taken on April 9, 2015 and depicts Amazon’s Account Selection. In total, we’ve reviewed 90 of Amazon’s page designs. To see them all, visit the full Amazon UX case study.