And it's pretty worry free, just plug it in when you're not using it and stick it next to your desk or front door or something. They're not very big, and only the small wheels really get dirty, so it's really quite reasonable to own. If something breaks, you could throw it out and buy a new one for less than renting, and you don't need to worry about paying per use or finding a scooter if you're in an odd part of town. And if it gets stolen, go back to renting until a new one is delivered. Or keep two so you can ride with a friend occasionally and never worry about being out of a scooter for a couple days if one breaks or gets stolen.

These are all things that take more effort than just renting. Not everything in life is an economics decision.

I pay less than $3/ride, and I ride maybe 3-4 times a week, not everyday.