title: Why does Twitter (twimg.com) use a suffix for size (e.g. ':large') instead of a query parameter
body: <h3>Why does Twitter (twimg.com) use a suffix for size (e.g. ':large') instead of a query parameter?</h3>
  <p>Example:</p>
  <pre><code>https://pbs.twimg.com/media/CrhajQHXgAEQ2US.jpg:large
  </code></pre>
  <p>From an architectual standpoint I find this interesting and I'm wondering if I'm missing anything.<br />
  Do they do this because certain proxies/clients don't cache urls with query parameters?</p>
  <p>Can anyone shed some light on this?</p>