I have a free Cloudflare account.
Is there a way to fallback automatically to the “normal” (non cloudflare enhanced) site if you exceed this limit, rather than stopping the site from working?
You have exceeded the daily Cloudflare Worker limit of 100000 requests.
If you do not take any action, your end users will experience 5XX errors until the limit resets at 2021-11-27 at 00:00:00 UTC.
You can restore service by upgrading your account to the Paid plan on the plans page. It has a minimum monthly billing amount of $5, and it is $0.50 per million requests beyond the first 10 million.
If you are using a Worker in front of an existing domain, you can disable it or set the route to fail open in the dashboard to continue to pass requests to your origin.
The Cloudflare Team