We did our last delivery back in late Spring of 2017, though we had experienced a decent amount of traction. The economics of on-demand gas delivery are difficult. B2B (e.g., delivery to car dealerships) seems to be profitable, but it is tough to achieve a price point high enough to warrant B2C sales (though perhaps in some ZIP codes it is possible (e.g., 90210)).
It was a fun ride, especially getting to use Clojure. I was the founding engineer (converted from an independent contract), so had plenty of room to make tech decisions.
Besides Clojure, there's a mobile app at that link as well, using Sencha Touch Framework. At the time we closed up shop, I had been experimenting with React Native + CLJS.
You'll also find an repo called opt that contains some interesting routing optimization algorithms that I did not write (warning, it's one long Java file).
On a related note, I'm currently looking for Clojure job opportunities.