API rate limits on the Zone Purge?
It get's a bit confusing in the docs about the rate limits, there's the 1200/minute limit but then the Purge section has it's own limits per account. However it's not clear if Purge zone versions is included in the Hostname/Single-file purge limits or if it's just on the 1200/min limit.
https://developers.cloudflare.com/cache/how-to/purge-cache/#availability-and-limits
https://developers.cloudflare.com/cache/how-to/purge-cache/#availability-and-limits
Cloudflare Docs
Cloudflare's Instant Purge ensures that updates to your content are reflected immediately. Multiple options are available for purging content, with single-file cache purging (purge by URL) being the recommended method. However, the following additional options are also available:
