There are a TON of websites that sell adspace to marijuana businesses. Leafly, weedmaps, high times. I would Pharmajanes will buy advertising on sites like this and also begin a strong social media presence. Then there is sponsoring events, giveaways, you name it. its called marketing and advertising. No reason Pharmajanes won't do this very soon!
Right now we are still in Beta and there is not advertising or marketing going on outside of the collectives that are operated by Medical Greens...right now PJ is not set up to handle a large in flux of customers...
You have to remember that a customer has to register first and that process take a few days at the moment. Several of the members on this board who have registered have shared their experience as they registered. I would guess that one of the areas being worked on during beta is the registration process. You will notice that the website states that it is "safe and secure" now.
With in a day or two of coming our of beta you will see that the search engines on the web will start to point to the site