Interesting contrast between Square (Dorsey giving back shares to the option pool) and Zynga in 2011:<p><a href="http://news.cnet.com/8301-13506_3-57322150-17/zynga-to-employees-give-back-our-stock-or-youll-be-fired/" rel="nofollow">http://news.cnet.com/8301-13506_3-57322150-17/zynga-to-emplo...</a><p>Asking for 'underperforming' employees to give their shares back to the option pool.