If one player plays a Negotiate card and the other main player plays an Attack card the player playing a negotiate card gets to collect compensation for each ship lost to the warp. If the player playing the Negotiate card is the Zombie, their ships will normally not go to the warp. Does this mean that the Zombie can't normally collect compensation? (unless their power is zapped) Or are the Zombie's ships sent to the warp which causes compensation to be collected, but then the Zombie's power saves those ships before they get there?
My understanding is that the Zombie's power is a replacement effect, meaning their ships never go to the warp. Given this, the official rules state that compensation is taken for each ship that the player loses to the warp when playing a negotiate card:
(Sorry - I couldn't find the newer rules in PDF form on the web.)
Since the Zombie's ships never make it to the warp because of the word "instead" in their rules text, they would not collect compensation for the loss. This is verified here at the Cosmic Encounter wiki.