There all kinds of ways you can bring visitors to your site, but the organic traffic from Google is proven to be by far the most profitable one since it is as targeted as it can get.
In this day and age, webcams are still selling very well for many reasons that I have discussed about in my posts (the main one being is the live experience or better a girlfriend experience that any surfer can have with a model and it is something no porn movie can give you) and paysites sales are shrinking overall but I know affiliates still do quite well promoting them but all of them are working with small niche sites that cater to a very specific audience.
Now, it does not matter if you run a cam tube site or the one embedding live shows or a blog that is a mix of everything (has videos, pictures, embedded rooms and text obviously), when you are ranking for webcam related keywords.
I have different types of webcam sites and they all can convert if they get decent organic traffic that is looking for live girls or guys.
A general tube like PornHub that wants to cater to all niches and ranks for general and unproductive terms like free porn or adult videos, will obviously not bring as many sales (unless it gets millions of hits every day) because a vast majority of people that ended up finding such sites on Google, just want to watch movies for free and they do not want to spend any money.