<i>&quot;Although admirable, it is not apart of the Bill and Melinda Gates pledge that many billionaires (notably, Buffet) have taken of giving away half of their new worth before they die.&quot;</i><p>Are you referring to The Giving Pledge [1]? Both Mark and Priscilla have signed it [2]:<p>&quot;We salute the Giving Pledge movement, and are proud to be part of its declaration that those who have been fortunate should give back at least half of their wealth during their lifetimes.&quot;<p>[1] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;The_Giving_Pledge" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;The_Giving_Pledge</a><p>[2] <a href="http:&#x2F;&#x2F;givingpledge.org&#x2F;pdf&#x2F;pledge-letters&#x2F;Zuckerberg_Letter.pdf" rel="nofollow">http:&#x2F;&#x2F;givingpledge.org&#x2F;pdf&#x2F;pledge-letters&#x2F;Zuckerberg_Letter...</a>