Keep in mind that one mechanism for control is to slowly suck someone into a scheme over time. I'm sure this has a name, or many names, though I'm not aware of it.
A friend had a professor at uni who'd been recruited to join a deep-sea scientific mission which was an absolutely incredible opportunity: a phenomenally well-appointed ship, newly constructed, a large scientific crew, and funding was completely assured.
He went on the project, returned home, and read much later in the paper that he'd been part of the cover mission for the recovery of the sunken Soviet submarine K-129, aboard the Glomar Explorer. According to the professor, he'd had absolutely no inkling of that mission.
https://en.wikipedia.org/wiki/Glomar_Explorer
That's one method.
The one used by Saddam Hussein as he executed (so to speak) his 1979 coup was rather more direct, and is explained here by Christopher Hitchens:
https://youtube.com/watch?v=CR1X3zV6X5Y
During WWII, numerous individuals turned on their own countrymen, comrades, and fellow Jews, as Quislings, collaborators, and capos, through a mix of threats and rewards.
And of course, various paths toward corruption are seen all the time in gangs, business, government, institutions, and other contexts.
That said, I'd have a very hard time working with anyone who is still working for a Facebook, Google, Amazon, Oracle, Palantir, AT&T, Verizon, or numerous other firms in the surveillance capitalism space today.