Less effective in what way? The actual answer is their use for training AI isn’t as good, but that’s not what I think you (or most other people) mean. The main use of them is to train AI via humans, the security is secondary and just a smart way to get free work.
Capchas aren’t generally case sensitive though.
They’re not? Doesn’t that make them less effective?
Probably? I’m no expert but I always answer with just lower case without issue
Less effective in what way? The actual answer is their use for training AI isn’t as good, but that’s not what I think you (or most other people) mean. The main use of them is to train AI via humans, the security is secondary and just a smart way to get free work.
Less effective as the intended use of a CAPTCHA. Not as AI training.
AI training is the intended use of a CAPTCHA
Depends. I know that Microsoft changed to non-case sensitive not terribly long ago (for things like testexchangeconnectivity).