&gt; but I don&#x27;t see how the <i>LE</i> guys would be annoyed about thousands of requests for TLS certs from a single user. The system is automated, after all. :)<p>We have to actually run a complicated server that does things with an external Hardware Security Module. CPU time, disk space, and bandwidth all cost money, and there&#x27;s a finite amount of money we can spend on resources :)<p>Thus, rate-limits. That also helps keeps latency low for most users, and prevents DDOSing.