The key is public by nature — it travels in the page source. It only works on evolut.top: a request from anywhere else is served, but never counted.
pk_9f055d5e25a5148b810d8e05
<script src="https://relay.mib.news/w.js" data-key="pk_9f055d5e25a5148b810d8e05" data-count="4" async></script>