With United dropping EWR-EZE, my primary, year-in-year out long haul flight, it's not longer worth collecting miles on United. With JFK-EZE on AA being the remaining preferable option, I think it's time to switch to AA. Just doing a search, I found a 30k miles offer for signing up for the AA Citiadvantage card, but I'm wondering whether there's any better offer going on right now, before I sign up for that.