A quadruple-whammy of football and F1 was too much for Sky Go and Now TV as the broadband TV services again folded under viewer pressure.
Viewers were unable to log in or booted out as three Premier League games including the title decider clashed with the Spanish Grand Prix.
Now TV viewers will be refunded their Sky Sports Day Pass, as the internet services became victims of their own popularity for the third time in a just over a month.
A statement on the Now TV user forum said: “We’re incredibly sorry about yesterday’s viewing problems. This isn’t a good enough level of service for you and we’re working round the clock to make things better.
“We’ll be contacting all sports pass customers automatically to provide a refund or a replacement pass. You don’t need to do anything to make this happen.”
A lacklustre Spanish Grand Prix at 1pm didn’t overtax the streaming servers, but the simultaneous 3pm kick-off for Man City v West Ham, Liverpool v Newcastle and Tottenham Hotspur v Aston Villa crashed both Sky Go and Now TV in minutes.
Visitors to the Sky Go forum reported some service from 3.30pm, but Now TV wasn’t fully restored until 5.40pm, long after the final whistle blew.
April and May have shown the fragility of legal online TV services to over-subscription, compared to traditional satellite, cable and terrestrial broadcast systems.
The return of Game of Thrones brought down HBO Go in the USA on April 6, and a day later crashed Now TV and Sky Go for the UK prime-time premiere.
There were more problems for Sky’s services on April 27 when Liverpool went down against Chelsea, unseen by legions of Sky Go and Now TV users.
It’s been costly in more than reputation for Sky, which has had to refund users, who quickly turned to illegal streaming and file-sharing services.