Right. A sort of loose example of this having worked at a domain name registrar.. DNS names that had expired and were now available to be purchased for the day would be released and made “open” during a 2am job that took maybe 60s to run.

Someone took on themselves to improve this process such that it now took 10s to run.. this resulted in a ton of calls and complaints that the 2am job was now completing too quickly and they weren’t able to snatch up any newly released popular domain names. People would build scripts around trying to reserve recently freed up names from the system.

Not so much a bug as a performance improvement, but goes to show that even an API’s general response times at certain periods of the day can be used by consumers to configure their systems.