Quite simply, buying and selling Tripleclicks products is the only way any of us will make any income from SFI.
If no products are purchased then there is no money in the Executive Pool to share around for all EAs and above.
There is no business in the world where you don't need to invest a little money to reap the financial rewards.
And having a standing order with Tripleclicks of at least 1500VP each month guarantees you EA status and a share of the Executive Pool.