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I have a feeling this won't last very long now that they've publicized the fact that they profile a users interaction with the system. Things like rate of hitting captchas, mouse movements, characters typed before pressing send, etc are all easy to mimic and control if you know they're analyzing that info.

Well, since all this information has to be collected client-side, I'm sure people working on captcha solvers would have figured it out anyway.

Plus, there's a huge difference between them publishing what information they're collecting and actually knowing how they're using that data, IMO.

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