How to set up an affiliate program on a media site?

Question

Partnership programs

Hello.
I am running a small media outlet on economics and banking.
Affiliate blocks often pop up on all respected (and not so) resources, with the help of which traffic is exchanged with partner sites:

Question: how can I set up this story on my site? Negotiate personally or is there some kind of automation? Do I need to develop my own teaser that will be an exchange?
Help, please, to solve a problem.