JBI has been an intermittent acceptor of waste plastic and an intermittent supplier of end product. As a direct result JBI gets lower prices for its fuels and pays higher prices for its feed stocks.
As JBI becomes consistent in both ends of the product chain the costs of feed stock will drop and the prices received for end product will increase.
So in Summary.
JBI costs are dropping. JBI revenues are increasing. The cost of production are dropping. Margins are increasing.
The problem is, assuming the past predicts the future does not allow for change.