Hello!
It would be a better goal to teach a smaller number of EAs to each develop EAs themselves.
If you sponsor hundreds of new PSAs every year I don`t think that you will have enough time to help them when they need you and they will finally not work anymore. If you only sponsor them and you don`t help them you don`t have any benefits. It`s like you didn`t really have them affiliates.
I hope this advice will help you. Have a wonderful day!