>>chaps+c5
"Captcha" doesn't refer to any specific type of puzzle, but a class of methods for verifying human users. Some older-style captchas are broken, but some newer ones are not.
>>rfw300+G5
Since before LLMs were even an issue, there have been services that use overseas workers to solve them, with the going rate about $0.002 per captcha. (and they solve several different types)
>>bdcrav+e7
This is both true and misleading. It implies captchas aren’t effective due to these services. In practice, though, a good captcha cuts a ton of garbage traffic even though a motivated opponent can pay for circumvention.