Hi all,
When we originally rolled out our LE certificate provisioning, it was available for all domains that we manage, including sub-subdomains of your free user.opalstacked.com subdomains.
In November 2020 we had to scale that back due to some problems with LE rate limits, so at that time we switched all opalstacked.com subdomains over to a shared wildcard certificate.
We now have the rate limiting issues resolved, so I'm happy to announce that you can go back to using automatic LE provisioning for sites that use opalstacked.com subdomains, including multi-level subdomains like foo.bar.opalstacked.com. 🎉