These round off the list: Juventus Real Madrid Hamburg Dukla Prague Dynamo Moscow Ferencváros Marseille Borussia Dortmund Liverpool
And your clue is this. Whilst these all share common ground, some are significantly more common than others. Juventus are twice as common as Manchester United and eight times as common as Liverpool.
And the rest: Arsenal Aston Villa Birmingham City Blackburn Chelsea Coventry Derby Everton Ipswich Leeds Leicester Liverpool
Wolverhampton will join the group before next season. West Brom plans to join soon, too. And Coventry is probably regretting that they ever did.
Is it something to do with the number of games the teams have played in the Premier League? Wolves and West Brom will join the group once they play a certain number of games this season and Coventry were maybe the last team to join the group before they were relegated?
Good guess, but nope. If you ranked them, Man U would lead by a mile, while Birmingham City qualifies by the slimmest of margins.