I think bike riders get extra information about orders (presumably so they can refuse orders that they can't carry), but obviously car drivers would like that information too.

This is just based on my recollection from a friend of mine doing Postmates a few years back.

In a competitor app, I’m guessing it’s the same for Uber, bikers got paid more per mile because it was assumed to take longer. Also, bikers dont need proof of car insurance

I noticed the bike thing when traveling to NYC recently. I assumed it had something to do with the city's utilization bill not applying to bikes.