It seems to me that the big problem that the e-scooter companies have is how to regulate their customers. How do you control their behavior while they are riding? How can you keep someone from not riding on a sidewalk when riding in big city streets seems so hazardous? And how do you make them wear a helmet, especially when many bicycle and motorcycle riders don't do so? For that matter, where do they get their helmets from? They are not attached to the scooters when they are parked by their previous riders. While the cops could regulate these sort of things, I can't see that happening. There are just too many other much more important illegal things going on in San Francisco. If I was a scooter rental company, I wouldn't know how to make their customers toe the line regarding all of San Francisco's many scooter rental regulations.
Several cities in San Mateo county (the next county south of SF) have been allowing green and orange rental bicycles to be dropped off anywhere on their streets for about a year now. I keep wondering why no one seems to complain about that, but if they do it hasn't made the news yet. The only difference that I can see between the e-scooter rentals and the bicycle rentals is the lack of congestion in the suburban cities, compared with that of San Francisco.
In other e-scooter news: Today it was announced that the mayor of Sausalito is upset that e-scooter riders from San Francisco are riding the things across the Golden Gate Bridge into her city and dropping them all over the place. She says they are supposed to stay in San Francisco and have no right to enter Sausalito. From now on, they will be scooping them up and charging the scooter rental company a $150 fee for their return. And so it goes.......
Like I said before, you can have all of the rules and regulations in the world, but if no one pays any attention to them, what is the point? And what can these rental companies do about their customers' behavior - short of banning them from using their scooter and then watch them just rent another brand.