This is a very good question. The Time For You To Start Buying PSA(PERSONAL SPONSOR AFFILIATED) is just at the very day xou sign in Sfi Business.when you buy the PSAs and the are active it will make you growth fast since some could be inteligent in online business than you, hard working than you etc and all these actions are of great advantage to you.the more they buy or sell the more your commission without you doing anything. just buy now and you understand more in your commission.thanks