When you agree to broker a deal between a Product Producer and a Distributor in exchange for a percentage of sales.
See: traditional JV broker
ecs-live
Your second option is to bring in another partner (a distributor) in the A to B Brokering Deal. Someone who has their own distribution channel and access to the target audience you believe would buy.
Revisiting the question above... let's look at a metaphor we can apply to creating profit share projects with an A to B Brokering Deal. One where you connect a product producer & distributor.