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> useless CAPTCHAS (any sufficiently advanced bot can get around any CAPTCHA anyway). We solved this at our startup by (…). Of course this is easy to get around if the bot knows what you’re doing

So, by your own admission, your solution doesn’t get around the “sufficiently advanced bot” problem.

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I added custom captcha (simple math as slightly distorted pictures with audio alternative) on one of my forms, it prevents ~80% of spam submissions. less than 1% of spam passes, other ~20% are blocked on key words (like "sex", "passion", etc...).

Not sure why you’re telling me that. I’m not criticising CAPTCHA, my parent comment was.

I am just confirming that CAPTCHA still works against most basic bots.

Yes and I don’t claim to solve the problem completely. It’s an impossible to solve problem which BigTech wants you to pay mafia protection money to “solve”.

The point I was making is that you’re criticising something while suggesting something else even easier to bypass.

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