Possibly exceeding limits for Let's Encrypt and nip.io
Summary
I'm not sure if this is actually causing problems since it's never been observed internally or reported by users but in theory Let's Encrypt will have a daily limit of all Certs issued for nip.io base domains to be 50/week (per https://letsencrypt.org/docs/rate-limits/).
Now since our users are encouraged to use nip.io base domains during set up of Auto DevOps it's conceivable that they may be hitting these limits as we have many users.
Steps to reproduce
It hasn't been reproduced.