Unsure if this is the right place, but...
I'm United 1K. AA offered me a challenge to ExPlat, 25,000 points (not miles!) in three months. I took it not knowing what the terms of the deal would be until it was approved. If it'd been miles, sure, no problem. Points, no; I have to buy cheaper fares. So I never bothered to fly AA and the challenge expired.
What I am wondering is if US will do a match/challenge to CP for a United 1K pre-merger, because I'm pretty sure AA won't offer it again. Maybe after the merger?
Of course the grass is always greener but I'm sure hoping US doesn't screw up the merger for AA like CO did to UA.