I've seen people in México City doing this late at night. I wonder if they are aware of the real costs of their services. Also, do they only pick scooters below a certain battery level? I observed one crew that picked one but left the other one next to it.
They have algorithms to pick which scooters should be moved and charged and compute a price to pay the people who charge them. You ideally want all your scooters to be fully charged before rush hour in the morning.