How is the scooter rental market in general? In Portland I pretty much just see Lime now and maybe one out ten is being used, others are parked at the top of steep hills.
I used them a bit in Denver this fall. There were plenty of Lyft and Lime scooters around (I used the Lyft ones, because I already had the app installed). People were about 50/50 on riding them in the (pretty damn decent) bike lanes vs being sociopathic assholes brushing past pedestrians on the sidewalk.
Being hit by a city bus is unlikely--they're loud, they're in the traffic lanes (not the bike lanes), they move predictably. Being hit by shithead teenagers doing stupid burnout tricks on their rental scooters, on the sidewalks? Probably happens to somebody every day.