We've been running this for 6 months on Azure - and it has performed without any hiccup whatsoever (except the rare timeout here and there from the CI provider).

You could maybe consider highlighting this repo in a "package development/CI section" in your tinyverse guide? It actually took me a while to find this, and I would think this is a valuable alternative for people who want a no-frills R CI setup which relies mostly on Base R!