We had the same experience. So today, we are used to close our account ourselves before the 'neo' bank does it. No time to tell details now, have to drive to our bank to hand over a cheque.
"Together they sent 66.5k requests to our site within a single day."
Only scriptkiddies are getting into problems by such low numbers. Im sure security is your next 'misconfiguration'. Better search an offline job in the entertainment industries.
I am using JSONDiffpatch made by Benjamín Eidelman some years in production now. It is perfect, works in a browser and on a node/cloudflare worker/etc.
How does JSON Patch compare to JSONDiffpatch? It is not mentioned in the alternatives list.
From the site:
"Privacy-friendly with no tracking:
Your privacy is important. The WiFi4EU app ensures a private online experience with no tracking or data collection."
This app can only be installed via the GOOGLE/APPLE app stores, so this is a lie.