Hello!
My opinion is that it is worth to keep sending supportive emails to PSAs and CSAa who have o VP and been inactive for weeks or months, because you don`t know when they decide to start a real business. Maybe they want to do something in SFI, but they currently don`t have time.. or some of them aren`t sure if they have someone to support them.
Think of the time you spent to get those affiliates!
I hope that my answer will help you.
Have a wonderful day!