There have been a lot of answers to this question and I am going to have to agree with those that said both. SFI is not a get rich quick program, quick income is the wrong mind set for building your lasting business. You need to recruit both and encourage your ECA's to become PSA's, your PSA's to become ECA's, and teach both duplication.
Good luck to you, keep asking questions because it helps us all to learn.
See you at the top.