I was going to do this deal as well. I applied for the card and received it about 3 weeks later. In doing the 2 for 1 deal, the tickets came out to be about $1000 more than just buying the tickets with out the "deal."
I ended up buying 2 adult WT+, 1 child WT+ and an infant ticket, round trip from LAX to BUD and saved a lot money by not doing the "deal."
Even the agent on the phone commented that she saw no reason why I would do the 2 for 1 deal as opposed to just buying the tickets through her.