Airtag can track a car, and switching car in Russia is far more difficult than leaving phone at home.

Also, given how openly criminal russian government is these days, airtags can give them plausible deniability. Like, anyone could have forgotten an airtag in your back seat. With great battery life and virtial anonymity, it is a godsend for covert and unsuspicious surveillance and all kinds of crime.

Met some rich guy? Easily find out where he lives and kidnap his kids for ransom. I can't stress enough how casual this will get.