Oh, that's another thing about Aby. They even have a super-horrible home castle, with only 30 Admin, for extra-low income.
Here's a comparison with Agartha, who, not surprisingly, are also teh suck:
EA
Grow-3 29660 360 (Agartha Grow-3 29860 362)
Death-3 30080 324 (Agartha Death-3 29560 318)
MA
Grow-3 30370 348 (Agartha Grow-3 30490 369)
Death-3 29830 342 (Agartha Death-3 29518 310)
So, thanks WaltF4!
It appears EA Aby income is affected by growth-death scales like everyone else. I had only played with MA Aby, and I assumed EA was the same.
MA Aby actually does get a neutral growth/death income modifier, independent of the scales they take. But their castle really sucks, so it looks like they get less.
Edit: Thanks Endo too ... I was off testing when you posted. Actually, I think you may have written a post about all this about a year ago!