From Facebook’s Faustian bargain
The point here is that although Facebook might be controlled by Zuckerberg individually, it’s still nothing without its thousands of employees. And those thousands of employees have entered into a bargain with Zuckerberg: they’ll accept relatively modest salaries, and work hard, because Zuckerberg is giving them substantial amounts of equity in the company. Once Facebook went public, every single Facebook employee became acutely aware of the company’s share price, what direction it was going in, what that move was doing to their net worth, and what public investors wanted to see from the company (revenues, and profits, rising sharply).
As such, despite his voting control at board level, it’s actually really hard for Zuckerberg to keep his employees focused on long-term platform-building, rather than short-term obsession over the share price. For one thing, they don’t own the company; many of them are going to leave, at some point, and so their time horizon is necessarily going to be shorter than Zuckerberg’s. And at any company with broad share ownership and a public share price, employees are always going to pay a huge amount of attention to whether it’s going up or going down.
On top of that is the classic Silicon Valley problem — which is that employees are always searching for the new new thing, the company where they can get early-stage equity and make themselves a fortune. Or, at the very least, join a mature company like Apple where the stock can still rise enormously. If Facebook’s stock is going down rather than up, its employees will start looking for other opportunities, and the company will find it much harder to attract talent.