Looking to move from an affiliate agency to internalize the process and build key relationships with publishers/influencers.
I don't suggest any affiliate networks as a tool to "scale quickly" that is not the purpose of affiliate marketing or even these networks and chances are that if you don't have the relationships in place already, you will fail at this attempt.
You need to establish the relationships first... and that is not "scalable" you have to put in the work to build key influencers as brand ambassadors and then move into affiliate marketing.