The key is public by nature — it travels in the page source. It only works on nacree.org: a request from anywhere else is served, but never counted.
pk_c3202d928d417520b6bcb91d
<script src="https://relay.mib.news/w.js" data-key="pk_c3202d928d417520b6bcb91d" data-count="4" async></script>