Yahoo! Sports: Nearly 1,400 illegal World Cup streaming sites have ad revenue cut off in digital piracy fight

While the fight against piracy on the internet often feels like a fool's errand, there's one surefire way to affect those attempting to circumvent the rules: Turn off the money hose.

Trustworthy Accountability Group (TAG), a non-profit created by the global advertising industry to fight ad-related crime, says it's pushed to deprive almost 1,400 illegal World Cup streaming sites of their advertising revenue.

That move comes days after the U.S. Department of Justice seized nearly 400 sites streaming pirated World Cup content as part of its "Operation Offsides" campaign.