The key is public by nature — it travels in the page source. It only works on filocivico.mib.news: a request from anywhere else is served, but never counted.
pk_dd6f3cd709c0d981c0668dbe
<script src="https://relay.mib.news/w.js" data-key="pk_dd6f3cd709c0d981c0668dbe" data-count="4" async></script>