On: CAPTCHAs don’t prove you’re human – they prove you...

[canofbars]

>we were now doing a job for Google

And in return you get an internet that is not filled with spam and bots. Or at least less filled with bots.

[jkepler → canofbars]

Bots that we've trained. And there's also an xkcd for this: https://xkcd.com/2228/.