They still can make money from it since it's not available for sale commercially (EU laws prohibit this). So you can only get it by joining a club or grow it y

They still can make money from it since it's not available for sale commercially (EU laws prohibit this). So you can only get it by joining a club or grow it yourself, both are a hassle for most people so the black market will remain, but I expect there to be a lot more competition since not only organized crime is now able to partake but anyone who (legally) grows.