Sending Ride Ons from the app while running is an extra exercise by itself: focus on smartphone, search for the small arrow, move finger to exactly that symbol, tap twice while making sure that the tap does not end up being a swipe (guaranteed for me). And keep running while you do it 
Makes me lose my rhythm and once even my footing on the treadmill.
If I’m not missing an easier way than this, then it would be great if it can be added.
Maybe a big button to smash that will give a Ride On to the closest runner?
I will send them to people passing me or being passed by me most of the time as encouragement.