Plugserv is an ad server for your own projects. It lets you share traffic between your own sites.
Here's a live example using my account:
<p style="text-align: center">
<span id="example-plug"></span>
</p>
<script>
window.plugserv_config = {
elementId: 'example-plug',
endpoint: 'https://www.plugserv.com/serve/eb7e777e-9ec5-4323-acba-4e05f881cf42'
};
</script>
<script async
src="https://www.plugserv.com/js/v1/plugserv.js"
integrity="sha384-Ngv41QqyGqgFyjzQseAmANPgTafxpqZ3fRcQXsShP02KwdzUy9VzIrp/ARgmFEql"
crossorigin="anonymous">
</script>
This snippet rotates daily through ads like:
Here's some more details: