On each graph, points are on the Y-axis, and squadron position on the leaderboard is on the X-axis. Both scales are logarithmic. The light grey line (diamond marker) is the numbers for the previous measured season (in this case, 27). As in previous seasons, the approximate power-law distribution continues allowing estimates of total activity to be made without spending too long reading the boards.
(Political is excluded, because there are well-known exploits to allow very high scores, and because it's not clear even without the exploits what it's supposed to be measuring: the in-game description of "large and happy faction" is clearly wrong - possibly this will change if they ever implement BGS happiness properly)
Anti Xeno (247 pages)
Winners: United Independent Star Squadron (10% of all points), The Order of Dripnificence, Radius Group
Two new AX winners take the trophies this season, and The Order of Dripnificence return from their Season 26 Bronze. Total activity is a little down on last season, though still significantly up on pre-war levels.
Combat (812 pages)
Winners: We Rock You Roll (1% of all points), Anti-Xeno Initiative, Stellanebula Project.
A near-repeat of Season 26 for the trophy places, though with the Silver and Bronze swapping over, and a slight decrease in total activity here.
CQC (26 pages)
Winners: We Rock You Roll (29% of all points), EG Pilots, Black Swans
A first CQC trophy for EG Pilots, and a first trophy of any sort for Black Swans, as WRYR continue their mostly-unchallenged dominance at the top. While the total number of participating squadrons is slightly down, this leaderboard breaks with the general trend to see a higher total activity than in previous seasons, especially in the top 20 - fixing some of the critical bugs does seem to have helped.
Exploration (850 pages)
Winners: Radius Group (4% of all points), A.C.E. Exploration, Stellanebula Project
With the lack of a payout-multiplying exploration CG this season, totals drop back to their normal levels (though there is also a further drop compared with Season 28, too). A new squadron enters the trophies at Silver, and Radius Group pick up their second trophy of the season and second exploration trophy with a substantial margin over everyone else.
Powerplay (29 pages)
Winners: Madmen of the Mojongo (13% of all points), Lavingy's Legion, Federal Liberal Command
As with many of the other leaderboards, a slight drop in activity and squadron count. This is the seventh time these three squadrons have taken the trophies, the fourth in a row, and the third in this specific order, making this the most consistent set of leaderboard winners.
Trade (686 pages)
Winners: Pilots Booze Network Squadron (3% of all points), Winged Hussars, Brazilian League of Pilots
While this season, unlike Season 29, has seen some trade CGs, they've not been particularly profitable or common, so the trade board also sees a small decline in participation. All three winners are leaderboard regulars - PBNS getting their 7th trade trophy, Winged Hussars their 11th, and the Brazilian League of Pilots their 4th.
Other comments
Update 15 didn't cause the expected increase in AX activity, perhaps because the lack of Invasions has moved a lot of the war onto actions which don't show up on the AX leaderboard itself. Invasion numbers may rise again (they can't get much lower, after all...)
Whether Update 16 comes late in Season 31 or early in Season 32 probably won't make a lot of difference to the Season 31 scores, so unless there's a popular and profitable CG the numbers will probably be fairly similar to this season.