Some of your downline may have joined SFI, but then realize it is not the business for them.
Some of your downline may not be willing to put in the time required to build a successful business.
Some of your affiliates may not have the money to invest if they are not getting an income from TripleClicks or some other medium.
It can be difficult to encourage people to work when they are unlikely to see an immediate return. This will be particularly true of those who have been burnt in previous internet scams and lies.
The best way to convince and encourage your affiliates is to offer them incentives for working. Tell them how to go about getting PSAs that will not cost them any money. Teach them how to advertise and where to advertise.
Keep your affiliates in the loop by updating them with all that is going on in SFI. In your weekly newsletters repeat the information that appears in SFI news and alerts. Not everyone reads this!