The term "missing person" calls to mind someone who is in serious danger, but a majority are something minor, like someone quitting a job without notice or taking an unannounced trip. The vast majority are resolved by finding the person alive.

Flock helping close 10K cases doesn't surprise me at all, but it doesn't meant those people wouldn't have been found without it. It may mean less work for the police, but the police don't usually put a lot of effort into a missing person without evidence they're in danger.