>Surely it would make most sense to scatter a set of stands around a city (e.g. next to transit hubs, car parks, major shopping locations etc). Most people who want to use these things will likely arrive in a city via a transit hub etc and will likely be returning there at the end of the day.
From what I understand with the rental bicycles that we have here, you'll get charged a return fee if the bike is left outside a designated return point for more than a few hours. I would reckon they'll make a tidy profit off people who don't read the service terms on the app that unlocks the things and presume they can just ditch it wherever because "I'm only using it this one time", or consider the fee to be an acceptable alternative to finding the nearest return point and walking the rest of the way, since it's still probably cheaper overall than taking a cab.