Across the street from my house, it's fine to park in the evenings, and a tow zone during the day. People would leave Car2go cars parked there all the time, and, with it being so uncertain when the next person would get the car, those puppies were like manna from heaven for the city impound lot's balance sheet. Someone on my block tried putting their car up Getaround, too, but that ended right quick.
In many of the cities I've lived in, street parking is also odd/even in the winter in the denser parts of town where Car2go makes sense. Parking is less brutal further out parts of town, but I imagine actually finding and getting yourself to a car starts feeling like more hassle than it's worth. Seems like it could easily escalate into a choice between no customers at all, and customers who tend to produce negative revenue.