They do remarket to people automatically if many people have purchased both product_x and product_y. If you sell stuff to people on Amazon, you could also manua

They do remarket to people automatically if many people have purchased both product_x and product_y. If you sell stuff to people on Amazon, you could also manually set up a Facebook, Google, etc. remarketing campaign to do just that using your customer emails. They actually do advertise products to you in your favorite category based on your recent purchases. In general you see the same product remarketed to you over and over because it's an additional layer of difficulty to add people who have purchased a product from you to an exclusion list. It's definitely more effective to do that (and Amazon does try to do that to you if you either haven't purchased it after a certain period or have purchased it on that particular device), but with any really complicated website with millions of products some things are going to get lost. >If you have a database of 100s of thousands of people who all are suddenly looking for recipes and raw materials for a pressure cooker, why not advertise to them? If Instant Pot wanted to break Amazon's TOS and make some extra money selling their Amazon customer lists to publishers, they could probably do that. Otherwise Instant Pot would have to get into the publishing business themselves to get access to those lists.