Saturday night was a knockout victory for social media — and TV piracy — as people live-streamed the big fight to thousands of viewers who didn’t pay a cent to watch.

Many boxing fans bypassed the official cable channels, which charged nearly $100 for pay-per-view of the Floyd Mayweather-Manny Pacquiao fight, opting to watch for free via live-streaming apps such as Meerkat and Twitter’s Periscope.

Even paying viewers switched to Periscope after glitches on HBO and Showtime messed with their feeds.