Looks like we can’t reply to API Announements, so making a new thread. The following quote describing the rate limits should probably be updated to reflect the recently-announced increase in the “certificates per registered domain” rate limit:
If you’ve hit a rate limit, we don’t have a way to temporarily reset it. You’ll need to wait until the rate limit expires after a week. We use a sliding window, so if you issued 10 certificates on Monday and 10 more certificates on Friday, you’ll be able to issue again starting Monday. You can get a list of certificates issued for your registered domain by searching on crt.sh, which uses the public Certificate Transparency logs.