> It's worth nothing that everyone who works at Facebook, including the CEO, are random strangers
There is a big difference between a multi-billion dollar company that has a reputation, shareholders etc. and a completely random person (who could literally be anyone with any motives). You can't go to Facebook and give them an envelope of cash for keys to access other peoples Facebook accounts whereas some random guy is much more likely to be open to this.
Security online is already shit and people freely handing out access to their online accounts is not making things better. There's need to breach servers anymore, you just create a "fun" browser extension with god permissions that auto-updates and then after a few weeks just start harvesting usernames, passwords, card details, instant messages and emails... :/