The boxing super fight between Floyd Mayweather and Manny Pacquiao may have left many boxing fans disappointed, but it proved extremely popular among Internet pirates. It wasn't difficult to find a live stream of the fight on Periscope and Meerkat, with users sharing streams directly from their TVs into the services before the opening bell.
High demand for the pay-per-view, available for $90 or $100 in the United States, led to Charter, Time Warner and other cable providers enduring service outages shortly before the main event. Piracy likely increased due to the problem, which actually temporarily delayed the start of Mayweather vs. Pacquiao.
Both Meerkat and Periscope have been used to stream Game of Thrones, live sporting events, and other high-profile subscription cable TV shows. Obviously, streaming a PPV broadcast violates the terms of service for both HBO and Showtime, and likely breaks some form of copyright law, but holding users accountable is difficult.