Wow! coin operated releases for carts/trollies? I have NEVER seen that. Stores used to have spaced posts that would allow a person thru, but too narrow for carts, to keep them from straying....but the newer system is to actually put covered 'parking areas' out in the lot, so that people can take their groceries to their cars, then leave the carts there.
   I suppose that in smaller towns and certain areas, carts/trollies might tend to go all the way home with people who walk....but in large urban areas, 99.8436% of everyone drives to the market, it is seldom a problem. The biggest problem they have is with people NOT putting them in assigned places, but leaving them between cars or in front of other stores...etc.

I say again...wow...COINS?