That doesn't mean that he's a good image for medical marijuana. Perhaps it is just 420 week PR one time sponsored event deal? And not that he's fully onboard to be our celebrity smokesperson. eh, spokesperson.
For Rick, study up on him a bit though. He is against gun violence. That's what the film Reincarnation is about and the change from Snoop Dog to Snoop Lion. He says it's a transformation. Life-changing for him. People's values and beliefs do change as they age.