Actually there's a mix of profitable and unprofitable systems in that list. Again, let's break it down for each power:
Powers | "Pirate" Systems | Profitable |
Aisling Duval | 4 | 1 |
Archon Delaine | 1 | 1 |
Arissa Lavigny-Duval | 11 | 6 |
Denton Patreus | 8 | 3 |
Edmund Mahon | 0 | 0 |
Felicia Winters | 1 | 0 |
Li Yong-Rui | 1 | 0 |
Pranav Antal | 3 | 2 |
Zachary Hudson | 10 | 7 |
Zemina Torval | 10 | 3 |
If this is actual pirating (and it seems like a reasonable explanation), then the amount of profitable systems subjected to it would also suggest just how much 5th column activity is going on.
Let's assume for a moment that none of the pirate systems were pirated against the pilot's wishes (in other words, the pilot was in on it), and let's assume that all powers are equally smart. In other words, if one power's pilots are blithering idiots, then all powers' pilots are blithering idiots. In this case I'd say that the only reason to pirate a profitable system is 5th column activity.
Aisling: 25%
Archon: 100%
ALD: 54.5%
Patreus: 37.5%
Mahon: N/A
Winters: 0%
Sirius: 0%
Hudson: 70%
Torval: 30%
Put in order of the powers with the most 5th column activity:
Archon (100%)
Hudson (70%)
ALD (54.5%)
Patreus (37.5%)
Torval (30%)
Aisling (25%)
Now - you *could* argue that this is because Hudson pilots are sloppy, but in that case so are the Archon, ALD, Patreus, Torval and Aisling pilots, and personally I'd lean more towards maliciousness than incompetence.
I haven't done similar comparisons for previous cycles, but I'll be honest - these are some interesting ways of looking at things, so there's a pretty good chance that I will.