Yeah, but the pre-order discount doesn't apply via Stardock if you didn't originally buy it from them, no? Perhaps it's exclusive to non-Steam purchases of Trinity... was hoping there was a way to apply the serial number from Steam to a Stardock account to get the discount, but didn't see anything like that when I looked earlier... though I have been known to be blind before, hence my asking here.

if she has a stardock account with trinity on it, you can order it directly from the sins sight and if your loged in you should be able to get the discount.

I am having the same problem. I purchased Trinity from Steam and would like to get the discount for rebellion. I tried to enter the CD key that I have on Steam in the field for serial number to register Trinity but it didn't work.