Restricted Stock Units (RSUs) seems a lot less riskier since they would always be something of value, irrespective of how soon the company gets acquired or how soon employee leaves the company (of course, taking account of the vesting period). But this type of equity grant seems a lot less common. Is there any reason why?
[1]: http://www.businessinsider.in/Pinterest-just-made-a-deal-with-employees-that-could-rock-the-startup-world/articleshow/46670004.cms