Is this actually a serious impediment to the scooter business model? Bulk electric scooters can be sourced from Chinese manufacturers for <$200. The ride sharing services charge $0.15/minute.
You breakeven in 24 hours of ride time. Assuming 30% utilization during peak hours and 10% off hours, the payback time is less than two weeks of deployment. You'd have to expect 5-10% of your fleet to be vandalized/stolen every day, before it breaks the margins.