Amazon

Amazon's product page is the canonical example of density over editing. A single listing stacks the buy box, sponsored carousels, "frequently bought together," a wall of variation swatches, Q&A, and a review section that scrolls past the fold many times over. The buy box on the right rail is the one fixed point — price, delivery promise, and the stacked Add to Cart and Buy Now buttons stay anchored in place while everything else sprawls. It works because the path to purchase is ruthlessly protected, but the surrounding page reads like a junk drawer. Reviews are powerful yet gamed; "sponsored" results blur into organic ones. The interface optimizes for the next click, rarely for comprehension.