The production of IP souvenirs consumes a lot of materials, and its transportation and sales channels will consume a lot of energy as well. Many of them are non-degradable plastic products. The sales price is not high. Many are not even collectibles, such as in cinemas, the Coke cups for popular movies are thrown away after being used a few times. Although it is currently possible to calculate costs: manufacturing, logistics, channels, authorization fees, there will be some profits in the end...