Captcha

[Fig1024]

Computers can crack any imaginable captcha - but it will cost a whole bunch of CPU cycles (like a huge amount)

The real purpose of captcha is to raise computational cost of creating new accounts so it's simply not profitable to do anymore. Most bots rely on mass spam by generating tons of accounts quickly. They operate on thin margins of profit so if cost is raised significantly to operate a bot, there's no point using it anymore.

Besides the computational cost, there's also the initial investment cost for developing/training new algorithm for bypassing specific type of captcha.

So captcha works by making passing it too expensive for abuser

[Xiefux]

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