Whenever the user has seen some 8SELECT content, i.e. it was in the device's viewport. For example if an 8.SET Compose content is presented to the user.
Whenever the user has interacted with 8SELECT content. For example clicked on a product.
Interact events and order events from users are matched and are the base of the commission based pricing. If user A interacts with content from 8.API, e.g. product 42 and later buys product 42, 8SELECT will get a commission.