Why is this any better than just calling a delivery service that already exists? You get to maintain direct control over the strains you get that way as well. And you don't get any of the promotions from a physical dispensary.
Ex. Magnolia Wellness in Oakland does a $25 3.5g with a donation of $35 or more on Saturday, and 4.5g eighths on Sunday, both of which beat the price per gram of this service.