Ben Thompson just released a great post that talks about exactly this issue, including moats in the space.[0] Essentially, there is no two-sided marketplace advantage here like there is with Uber or Lyft (the drivers -> customers -> more drivers flywheel).

I like the idea of this playing out with 1-2 companies offering several different transportation verticals in each city. Rather than checking Uber, Lyft, Via, Bird, Lime, etc. to try to get from point A to point B, I can check an app that gives me the prices for ridesharing, scooters, e-bikes, whatever...and then I choose one of those options from the given company.

The moat here is to be the best aggregator for the entire network. Netflix has enough good shows for me that I don't pay for Hulu to watch the one show there that I'd like to see. The same idea exists here, just in the physical world.

[0] https://stratechery.com/2018/the-scooter-economy/ HN Discussion of the post: https://news.ycombinator.com/item?id=17284094