In my own opinion, I would rather tee the affiliate to go. This is because he has already made up his mind and you can,t force a horse to the brook and still force it to drink. You have done your best to introduce to him how to achieve financial freedom in SFI. It is up to him to accept it. What majority of people want is quick money and SFI is not a get-rich-quick business.
Therefore let him go if he/she so wishes.