I have a Yorick 2.0 artifact. It says:

Trooper:

Construction time: -5%

Cost +10%

If I activate the artifact and then cook troopers to send those troopers to infests, will my bank be filled 90+150+60=300 res or 300+10%=330 res?

Each trooper is always worth 300 resources.  So if you paid 330 to build them the extra is lost.  Similarly, if you have a -10% cost artifact and build them for 270 then load them into infests they still count for 300 so you make 30 res in profit.  This makes the permanent -10% thunderbolt and scar unit build cost artifacts especially useful.  These can also be stacked (ie if you have 2 of the same one you can activate both and the build cost is -20%). 

Thank you Bio. Consider the thread closed.

Without Wax,

Kavishankar.