An interesting side effect of these types of companies popped up during the Navalny team's investigation of Putin's alleged yacht in Italy. They got the ship's crew manifest and then used a database like TrueCaller to check it out. The manifest had the crewmember's name and a phone number - so when you look up the number associated with 'Alexander Pechurkin', other people have him listed as "Sanya FSB" "Alexander FSO" and "Alexander Graceful Procurement". [FSB = Russian security services, FSO ~= secret service, 'Graceful' = Putin's previous yacht]. Pretty interesting work history and descriptions for a Boatswain's mate in Italy.
https://youtu.be/WyYp9xPLa8s?t=423
These lists must be a gold mine for intelligence agencies.