They used to have them in the prem league breaks and I found the lower league games a nice diversion and a chance to see how some other teams are doing. It also made for a very busy season where it was hard to keep up with all the games, unless your name was Herc. I've looked into this recent decline to use them online a bit and the consensus is Sky weren't making enough money in bets that gameweek because many punters weren't confident enough to lay money on their selections, not having followed EFL games much, so if someone did happen to win the jackpot, Skybet could make a loss that week.
They've also been losing out heavily in money laid on football to rival Bet365 who have copied their super 6 game and offer much greater prize payouts as mentioned before, as well as having generally better odds on games. So savvy punters are still doing the Sky super six but putting money on their accas at 365, as I do now. The result - Sky have got meaner and leaner, slashing their ten beat the pundit prizes from £500 each to £100 each, and dropping the lower league gameweeks entirely. Conclusion - they've basically lost the big power battle with the market leader. Morning btw.