I'm using the Stack Exchange API with an access token and API key, and I was just checking my remaining quota. According to the documentation, this should be a number (somewhat) lower than 10,000, which is consistent what I've seen in the past.
However, to my surprise, today it's more like the 32-bit integer maximum:
This happens for multiple API routes, not just for /sites. I do get occasional backoffs, which I obey to. What's going on here? Santa Exchange giving out unlimited quota as Christmas presents? It does not matter which IP address I'm calling the API from.