The cheapest stuff that OCS sells is a paltry $17 an ounce less than street prices around here. And that's assuming they even have it in stock. They also sell shit that runs $634 an ounce. Not exactly the kind of prices that would negatively impact the black market.
And Johnny, I'd be filing a complaint about them recording your info. They don't do that shit at the liquor and beer stores so I don't see how they should be able to get away with it at pot shops.