Short answer, GPT didn't have general access to money and didn't decide to go out and find a user to solve a captcha, but it was given a test to see if it could convince a human worker to solve a captcha and it knew to lie to the worker that it wasn't an AI.

My criticism being that this isn't a particularly useful test, and that the whole "captcha" thing was (I think) mostly designed around show and not designed to give super-useful data. But they did actually run the test, I don't think they're lying about that.