When you are promoting your own offers, you have two options to track the conversions.
Use {hit-id} in your offer's URL when you setup the offer within FunnelFlux, then call FunnelFlux's postback when a conversion occurs, passing it back the received hit-id.
Without using the {hit-id} on your offer's URL, you can embed FunnelFlux's conversion iframe on your thank you page. You can find this conversion iframe in the section called "Your Links".