this post was submitted on 10 Jul 2023
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How is it a captcha if it’s machine-solvable?
Machines are better at solving captchas than humans. No, really.
It works because it is different from other captchas that all have ways to workaround already automated. Having a niche problem for a niche community works surprisingly well for weeding out the widely cast bots that are designed to solve the common captchas. Though it wont do much for a dedicated attack - I don't think they have had much of a problem with these and the mods can always change tactic when it no longer becomes effective.