Huh??? You're not making any sense. The dispensaries have to spend money on security whether they do it with CAFS or through some other company. Keep in mind that these are cash businesses (banks still can't do business with MJ companies) with very valuable inventory. If CAFS does it through their preferred vendor, MCIG, they get a kickback and commission.
What does Security Grade Protective Services offer that dispensaries and grow ops all need? From their website here's a summary list (details are even more impressive)...