This is in the article.
replyIndeed, half the point for reCAPTCHA: That how Google could justify supplying reCAPTCHA for free, but not why people wanted to use them.
> That how Google could justify supplying reCAPTCHA for free, but not why people wanted to use them
replyThis and Pokemon Go for collecting videos: are there other examples of users doing the free work for $large_co?