I doubt it's multiple accounts on the exact same service. I'm guessing fb.com is...

		creato on Feb 15, 2019 \| parent \| context \| favorite \| on: Facebook's security team tracks posts, location fo... I doubt it's multiple accounts on the exact same service. I'm guessing fb.com is a near-clone of facebook.com's codebase, personal accounts are facebook.com accounts, and work accounts are fb.com accounts.

Maybe it's a separate database, but cloning the code is a terrible idea.