Thank you for the explanation, that actually makes sense. But I still think that serving a 429 is some kind of backwards old-school sysop kind of response. "It's the right HTTP-Code! hohoho!". It's obviously running nginx and serving a static copy of that url or setting up caching would take the same amount of time as serving the 429. It's 2023, it's possible to serve some thousand requests to static content on pretty much everything now.