I am an affiliate and a business owner, I have been on both end of the coin as a freelancer/marketer and as a seller. I must say, affiliate networks suck! They havent been working for me much and I can get my small business off the ground because to join a netwok you need to have a minimum prestige. Also current networks do not allow much negotiation and human interaction betwen businesses and freelancers which is why I am recently joined a start up which has a goal to create a new affiliate marketing platform to facilitate the process for both businesses and affiliates.
We are currently in lead generation// research phase to understand better if many other freelancers and business share the same problems and what they prefer, we have a quick survey right here, if you could take the time to complete it, it would be great: https://forms.gle/sf4JoGkhZsoUrkbz5