You do see it often in things like canned ecommerce software. They have this ecosystem that encourages you to add widgets to category listings, product listing

You do see it often in things like canned ecommerce software. They have this ecosystem that encourages you to add widgets to category listings, product listings, etc, that all create queries keying off the page context. Where widgets might be "similar items", "people that bought x, bought y", "recent purchases of this widget", "best sellers in this category" and so on.