This service is probably meant for people with higher-value ways to spend their time than fill up their gas tank, i.e. business owners.
On the other hand, during the winter maybe there's a market in North Dakota.
This market mentality doesn't (shouldn't?) apply to social relationships because it leads to stupid decisions (like to give your CC number to a stranger). Next thing you're weighting how much your family time is really worth vs. making another buck.