brotkrueml, Another extension of mine supports the brand new site sets introduced with #TYPO3 v13.1 💪: "Form Rate Limit", which provides a form finisher that limits the number of submissions of a form.
https://extensions.typo3.org/extension/form_rate_limit
If you don't know site sets, here you go 📘:
https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ApiOverview/SiteHandling/SiteSets.html
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