> It's not like the number of puzzles makes a difference to a bot They do actually. A lot of the captcha process isn't just yes/no to the answer anymore (thou

> It's not like the number of puzzles makes a difference to a bot They do actually. A lot of the captcha process isn't just yes/no to the answer anymore (though this signal seems to be increasing lately). They also monitor timings on clicks, movement of the mouse, etc to identify a bot vs a real user. More data on these signals = better reliability for detecting bots.