I see this post is a bit old but I hope you're still looking for answers! You asked for a hack, so I'm thinking you've exhausted some of the more standard ideas. I don't know much about your business, but local services probably tells me just enough....

One problem with two-sided markets is you need demand for both sides. But demand is difficult to drum up if one side sees lack of demand on the other. And so it goes. One way to solve for this is to use a matching algorithm to match someone making a request with local service providers. What this does is it keeps the small number of actual providers from being exposed to the end user. So they'll still have a decent user experience if you can effectively communicate the small return to them. I used this technique when I founded my music company. We hadn't yet cleared the 7 million tracks from the major labels, so to make it appear as if we had every song ever written, I developed an algorithm that matched personal attributes (mood, things they enjoy, etc.) and delivered music that matched their profile. Obviously, it came from the database we had which was much smaller at the time. The second thing we did was remove search so that the diminutive size of our catalogue would not be exposed. Of course, we changed up everything once all the clearances were in place. But these two tactics were instrumental in landing more paying clients, the "other side" of the market (in our world). Lots more but no room. PLS upvote so others can read it.

At first impression--because you need so many drivers--is I'd like to understand more about bus drivers, generally, and what their interests are. I'd also like to understand what other sorts of occupations translate well to driving, where some of your positive attributes can help someone consider a position or career change. Perhaps it's a higher hourly rate than what they're earning now, schedule flexibility, working with kids - whatever it is. Then put yourself where they are and get into their lives. Facebook is an obviously good place to start. Get yourself in the conversation and promote the good, interesting things about the opportunity you offer. If I was running this engagement, I'd map everything out and consider expanding the size of my funnel by asking questions about who we're looking for, where they spend their (virtual) time, and how to get in front of them. Happy to chat. PLS upvote if this was helpful.

You have an obvious advantage over other business types in that your product is something almost everyone aspires to. So, when you consider the importance of content, you're a leg up and I'd leverage the appeal and aspirational qualities inherent in your visuals to drive the behaviors you seek. I'm assuming you have the ability to use member profiles and visuals in your terms of service? I'd highlight several of the best....

I love landing pages and LaunchRock is one of the best. The beauty of a landing page is there's almost no wrong answer. In other words, use landing pages as a means to gauge how people might respond to you. They enable you to A/B test which basically means you can experiment with slightly different versions of the same landing page to see which gets more traction.

The first question I'd ask you is who is your intended audience? You obviously built a prototype of some sort. If I were to assume you've solved a problem, who did you solve it for? When those people are out searching for a solution to their problem, what are they searching for? How does the conversion sound? How can you use your landing page to insert yourself into that search?

There's not enough room here, but a using a landing page as part of a user onboarding, education, lead gen..... (whatever) strategy is a very good idea. You also may not know some of these answers, so using a landing page will inform you of who is actually interested in what you're offering. You may find it's a different market altogether.

Anyway, just a quick handful of thoughts.