Why do tube sites have Content Publishing Programs?
 

I see many popular tube sites have Content Publishing Programs, how do they make money from these content publishing programs and what's the benefit of having it?

somebody has to answer this!

I am not a specialist as I do not have a Content Publishing Program, but it definitely helps companies to get brand exposure and sends traffic to their sites, where they can convert it.
For the tube, its great content they can give to their users plus they are monetizing the traffic as well via advertising.

The publishers upload their videos and get people to their sites and the tubes gey free content.

Besides using their CPP to get content, what other benefits does it give them?

Fresh content in decent amount = more users = more profit