[DrStalker]

Why pay people to do this when you can make a CAPTCHA that requires them to do it for free?

Google must have a really good data set from all those "click the boxes containing X" tests they make people do.

[floatingatoll]

Most people don't have the funds on hand to use predatory pricing^ tactics to train machine learning algorithms.

^ "the pricing of goods or services at such a low level that other suppliers cannot compete and are forced to leave the market", to quote Google's definition (that was itself taken from some other company's dataset).