I suspect every ruler is, not just in tech. Not every one of them has a mission that'll inspire such devoted employees, though. If you run a company and you need people, you need to give them enough that they want to stay working for you. The best conditions for an employer is where all your customers are flush with cash and all of your employees are in a horrible economy preventing them from asking for more or seeking employment elsewhere. B2B (which Twitter is) is a perfect setting for this.
I hope that the remaining Twits at least are compensated well enough in the now to take the risks.