It is definitely complicated, and there are a few main levers that they can pull. From what I know, it’s a mix of ads, affiliate marketing, and premium subscriptions. To see which one works the best, I checked out different platforms, and they usually have a very diverse mix of ads and videos. It seems some sites get deals to promote larger platforms, while others focus on building their own libraries. In many cases, they also sell their own lines of porn as exclusive content.