Technically nobody has joined the proposed Conference League as it doesn’t exist. Celtic, Rangers, Hearts have three teams in the Lowland League so are obviously voting in favour . As Aberdeen said they’d vote against it, it leaves one place open , which from your comments I’m assuming QP have expressed an interest in. Although I’ve also read that QP are now proposing to vote No , along with quite a number of Scottish League clubs, in fact I haven’t come across a “ Yes “ club , presumably Celtic , Rangers and Hearts are Yes.
The AGM when the vote is scheduled to take place is this Tuesday , so we’ll know more then .