It is not even legal to trade. It is tolerated (but not quite legal) to trade and own small amounts (5g), and a coffee shop may have 300g in stock on their prem

It is not even legal to trade. It is tolerated (but not quite legal) to trade and own small amounts (5g), and a coffee shop may have 300g in stock on their premises. The shop needs to acquire its weed in illegal, non-tolerated ways. This causes all kinds of problems and absurdities. Despite our reputation, the Netherlands are now behind when it comes to legalization of marijuana.