Just because you can technically crack them doesn't mean they're useless.
There's a significant amount of time, skill and effort that went into the solution from this post, and the end result doesn't generalize well (you'd have to start all over for a different kind of captcha).
The vast majority of spammers would not be able to replicate this; those who do would either make money legitimately, or focus their skills on juicier targets (if you have AI/ML skills and want to do nefarious things there are other options that pay much better than spamming).
Such captchas still work well at raising the cost of successful spamming above the expected payoff from said spam.
There's a significant amount of time, skill and effort that went into the solution from this post, and the end result doesn't generalize well (you'd have to start all over for a different kind of captcha).
The vast majority of spammers would not be able to replicate this; those who do would either make money legitimately, or focus their skills on juicier targets (if you have AI/ML skills and want to do nefarious things there are other options that pay much better than spamming).
Such captchas still work well at raising the cost of successful spamming above the expected payoff from said spam.