TFA says that Facebook has a &quot;Gold&quot; level sponsorship. Gold sponsorships cost $150K&#x2F;year (see <a href="https:&#x2F;&#x2F;letsencrypt.org&#x2F;become-a-sponsor&#x2F;" rel="nofollow">https:&#x2F;&#x2F;letsencrypt.org&#x2F;become-a-sponsor&#x2F;</a>), which isn&#x27;t much for a company the size of FB. (It&#x27;s not even the most expensive sponsorship level available -- Akamai and Cisco are both &quot;Platinum&quot; sponsors, for instance, which costs $300-350K&#x2F;year.)<p>So the motivation is pretty straightforward: they spend what to them is a small amount of cash in order to get a little goodwill and maybe some positive press. (Which are the usual reasons corporations sponsor not-for-profit projects anyway.) Everybody wins.