Originally Posted by
nistah
We are both hoping to use the first checked bag free benefit on Barclay's Aviator & Citi AA Advantage card for a grand total of 4 free checked bags.....
Any data points on how this will or will not work?
Thanks in advance

Don't count on it. You should each get 1 checked bag. Same thing for if you redeem miles. Each card gives you 10% back. So for a redeemed 100K you get a grand total of 10K miles back regardless of how many AA Credit cards you own. I do have a data point for that, and Barclays and Citi each credited 5K miles back since I hold both cards, and pre-merger I got 10K back from my Citi card.
I think if you read the fine print of your card you will see the benefits are tied to your FF account not your card.
Perhaps you will get lucky though, let us know if this works for you.