It's tricky. It wouldn't be employee owned if you could sell your shares to the public or keep them indefinitely after you leave. That's why you have to sell them back to the company/employees. Doing that over a period of time makes you value longer term company performance vs short term.
What do you get out of "owning" shares that you can't sell and that have no market price? Why would someone want this instead of just being paid cash for services rendered by someone else who's bearing all the risk?
time preference slash discounting. so not sure what you mean by "have no market price" bezos is worth XX billion, but not if he tries to sell it all at once