And since we released it about three or four years ago, a lot of websites have started switching from the old CAPTCHA, where people wasted their time, to the new CAPTCHA where people are helping to digitize books.
muitos websites começaram a trocar o antigo CAPTCHA em que as pessoas perdiam seu tempo para o novo CAPTCHA em que as pessoas ajudam a digitalizar livros. Assim por exemplo, Ticketmaster.