Checking forums at other PWE games does not reveal happy customers. Lots of threads about people not receiving promo Zen. I don't think it's worth it but if anybody tries it, please post your experience, especially with the Netflix promo.
also lots of threads of people just playing the game. just so happens complainers love complaining and post first when their blood is boiling.
personally i avoid the free zen offers (has some bad spam when i tried it when it first came out a couple of years ago). As for the ads. A decent browser that has addons will prevent you ever having to see them again.