That is the exact move I am trying to make with my shop. In this industry, the product evolves so fast and products become obsolete. You can not tie up too much into a product and have mass quantities, because then you will not be able to sell it because no one will want it.
Also, their e-liquid, binary has been getting rave reviews at my shop and is liked by a reviewer I am associated it with. Binary is what could make them the most margin.