How has marijuana legalization in various states affected the lowest level of dealer?

I've been thinking about for a while now how a lot of marijuana distribution used to be done basically as a part-time job by a whole bunch of people for you know maybe a couple hundred bucks a week. Legalization has centralized that into dispensaries that only employ a handful of people and have much more throughput. anecdotally on my end I live in a state that has only very recently made recreational marijuana legal and dispensaries aren't a regular thing yet and the people I know in that line of work 150 a week makes a big deal to their budget.