I have before, but I'll check it out now.

The problem with this is that it's brutally difficult to start the network effect. That's mainly what Uber and Bolt waste shittons of money. You either have not enough drivers or not enough riders. Equilibrium is super hard to achieve. And if you are out of equilibrium, the app becomes unusable. You don't want to wait half an hour for your ride, because the only car is on the other side of the town. And you don't want to use an app that has no riders.

Andrew Chen described it nicely in Cold Start Problem.

I have experienced this with my other project and it's hardcore.