[confusing3478]

> Or maybe your IP/browser is questionable.

I'm using Firefox and Brave on Linux from a residential internet provider in Europe and the 429 error triggers consistantly on both browsers. Not sure I would consider my setup questionable considering their target audience.

[grodriguez100]

I’m browsing from an iPhone in Europe right now and can browse source code just fine without being logged in.

[JeremyStinson]

Then it means they're looking at the User-Agent string and determining that an iPhone in Europe most likely has a human using it, and might not require rate-limiting.