Both has its own way of interpretation of pros and cons.
Sponsoring fewer PSAs and concentrating on coaching & helping them build SFI business. The fact is how many will show active/interest signed and responding to your emails? 1st few days frequently login to SFI homepages and doing the routine tasks after sometime missing in action 3 to 5 days or more.
Continuously sponsoring new affiliates. These might help maybe if you are lucky.