That's pretty crazy. At a big social media company, a service I ran got 300K+ requests per second directly from end users.
For example, it is just as true for this title to have said "How Amazon uses ... to load 1.6 MM requests per second, from just the search page."
Each search page load, is 1 request to the search backend, but 20x request fanout to the product's key-value store to render the images and titles, etc.