YouTube Expands Crackdown , on Ad Blockers.<br />Earlier this year, YouTube began testing its ability to stop viewers from using ad blockers.<br />A pop-up alerted users that they would be permitted to watch no more than three videos if they continued to use ad blockers.<br />The "small experiment" was meant to encourage people to enable ads or give YouTube Premium a try, Engadget reports. .<br />Now, the company is launching a <br />global campaign to put a stop to ad blockers.<br />The use of ad blockers violate <br />YouTube's Terms of Service, YouTube spokesperson, to Engadget.<br />We've launched a global effort to urge <br />viewers with ad blockers enabled to <br />allow ads on YouTube or try YouTube <br />Premium for an ad free experience. , YouTube spokesperson, to Engadget.<br />Ads support a diverse ecosystem <br />of creators globally and allow <br />billions to access their favorite <br />content on YouTube, YouTube spokesperson, to Engadget.<br />In July, the price of YouTube Premium <br />was raised from $12 a month to $14.<br />Premium Lite, a more affordable option, <br />used to be offered in some European <br />regions, but it was ended on Oct. 25