Okay, so after many spy ops I'm pretty sure that expenses bonus affects GDI costs and land costs.
I know this because for a non-theo the alliance cost for someone who has no allies and non-free GDI is Land x 5.

For this particular player (without revealing who it is, as this is a long ago op, impossible to trace! and scaled):

Land = 17532
Alliance cost = 74336
(Has no allies)

Therefore the alliance cost has to come from GDI, and instead of being 17532 * 5 = 87660 it is 74336, which means the player has (87660 - 74336) = 15.20% expense bonus (19points x 0.8 = 15.20%)

The bonus tool-tip states specifically that it only applies to military, yet it doesn't.
The land cost for this player was also scaled down by 15.20%. It was not Land x 10 = 175320 as it should be without any multipliers.

Could someone clarify?

Yes, you are right. Anything under the Expense Breakdown column in your advisor page is affected by expense bonus.

Even for corruption. :P

Kay, maybe the tooltip should be changed.
Might affect how I spend my points next set I play, lol :)

Lol, you know this is in your advisor page. right? No need for spyops.

You're right, I thought I was so special things were different with other people.

I have another question (p.s. post above was sarcasm).

I know a while back the jet losses formula was updated and I tried to look for it in the announcements page to no avail. What is the % of jets do you lose? Does it depend on relative NW size?

eManny for president

I am proud that I contacted eManny and asked him to ally me in one of his earliest resets. I have nothing to do with his great talent for this game but at least I recognized it :D

It was 8% losses for each attack in the past. Then it changed to be dependant on relative NW size, now its back to losing 8% flat rate.