My understanding is that the site was always responsible for the usage quota. The calls made (even on the client side) technically is made by the website, so th

My understanding is that the site was always responsible for the usage quota. The calls made (even on the client side) technically is made by the website, so the limit applies to the website. If requests come from the end user and not the site (as you mention), very few people would hit that limit and it would not be a concern.