Porn sites make money from few income sources, some of them are PPL, PPS, Popups and CPM ads.
If you don't know anything about these income sources I will break them down for you here:
PPL is Pay per Lead, so if your ad click send them to some webcam girls site and if they register there for free so they can just watch these girls, you will get 2-5$ from every lead.
PPS is Pay per Signup, if your ad click send them to some webcam girls site, and if they register there and if they pay some money to chat with girls 1 on 1, you will get 50-130$ per signup.
Popup ads are ads you can see when you click on some porn site and they popup in front of your face, or under your window (those annoying pop up ads). These ads are not so huge money makers so you will get 0.01-0.1$ per one Pop up but if you have tons of visitors they can make some serious cash.
CPM ads are Cost per Mile ads, so you will put banner ads on your site, and you will make let's say 1-3$ per 1000 people who see these ads.
Porn sites can also make money from other income sources like Paid Subscriptions, Paid advertising and from publishing DVDs.
So there are tons of monetizing options because this niche is huge, and both publishers and advertisers can make nice money with it.
