SFI is a business that pays you according to profit made from daily sales. If you are able to make enough sales from TripleClicks, you will start earning commissions even from your first month. It all depends on your ability to make sales.
You will also earn commission when you have active PSAs and CSAs who have attained the EA (Executive Affiliate) status. You on your own side need to attain at list an EA status. You will also earn a share of the TripleClicks Executive Pool for doing so.