Here are some pics of my Scout list.
'New' means did not appear on the previous list.
'*' means does not appear on the Next list
I have not bought any players from the Scot Market.
So I decided to build 2 lists, taking my cue from the "New Players on...." message, and then look at the list the next day.
Day 13 - a list of 45 players
Day 17 - 9 new players. 4 of the new players have the same roles as 4 who dropped off the list, 5 have different roles.
Day 18 - 3 new players. The 3 new players have the same roles as the 3 who dropped off the list.
I still maintain that changes are due to 2 factors: 1) periodic/scheduled list shuffle and 2) sales. I do NOT claim this proven, just observed.
PS. I can't guarantee I've not missed one or two but I don't think I have