It is an online advertiser's dream Some ads on the websites you visit could soon be impossible to ignore, as they will be integrated into the "captchas" used to check whether site visitors are human. With many web users using tool to block online adverts, companie must find new ways to get their message across. Software firm NuCaptcha, based in Vancouver, Canada, believes the answer lies in captchas, as they require a user's full attention to solve.
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