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by rattray
2229 days ago
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I like the cleverness and simplicity of the bitcoin mining approach, but the tradeoff between "takes too long, damaging our signup flow" (where anything more than 5 seconds is likely to have a material impact) and "doesn't take long enough, making it too cheap for bots to proceed" may be quite tricky. Charging a buck is extremely simple, and fair. The SA example tickles me. I wonder if the folks who dislike reCAPTCHA would be willing to choose to pay $1 if given the option between the two. |
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Another commenter said that the market rate for reCAPTCHA solving is 1c each, so $1 is probably more than most would pay.