Yes, it was Twitter, and and the spies were working on behalf of Saudi Arabia: <a href=“https://www.washingtonpost.com/national-security/former-twit... Twitter employees charged with spying for Saudi Arabia by digging into the accounts of kingdom critics</a>

It was twitter. But that's largely moot -- there are almost certainly spy-espionage types in a lot of large tech companies. Mostly for siphoning off tech secrets, but I'm sure having someone with root access to some $SYSTEM is useful for political purposes too.