The key is public by nature — it travels in the page source. It only works on dasa.org.ua: a request from anywhere else is served, but never counted.
pk_cb01cf3c9c5b5d864124d456
<script src="https://relay.mib.news/w.js" data-key="pk_cb01cf3c9c5b5d864124d456" data-count="4" async></script>