Since you mentioned donating, rather merely giving them away. . . this reminds me of a recent thought that I had while flying with my wife: What about donating an upgrade anonymously to a service member as a gesture of thanks?
I had this thought after my wife and I used stickers to upgrade on an AA flight on New Years Eve. Only problem was that when we boarded, I noticed that we weren't next to each other, but rather we both had windows. Sure, no sweat. I thought, "it should be fairly easy to arrange a swap (especially with a window)" but no go. . . the woman next to me wanted no part of a window seat. So as we were waiting for the appearance and boarding of the gentleman who was assigned the seat next to my wife, I looked out the window and saw pack after pack after pack after uniform pack being loaded. Sure enough, the flight had probably almost 40 service personnel flying out of DFW. I decided that if I couldn't sit next to my wife, I would ask the FA to reseat a service personnel in my seat, and I would sit back in Y. After all, what's the point of a sticker if you can't even sit next to your wife?
Turns out, however, that the gentleman assigned the seat next to my wife boarded and he was quite courteous and happy to swap his aisle for my window. But the thought dawns on me as a nice gesture to consider sometime when I'm traveling alone, if AA would allow it.
Anyone out there know if the airline would allow such a gesture? The T&Cs for SWUs seem to suggest that it's likely either challenging or impossible (and thus likely similar for stickers).
Upgrades are only valid on individual published-fare tickets. Upgrades are not applicable to AAdvantage travel awards; any free ticket; military or other government fares; opaque fares; infant tickets (including INF50 fares) or purchased extra seats.
But my question is this: What if you are on the same flight? Would they just allow you to essentially swap seats and voluntarily move to the Y cabin? As you were boarding a flight, could you just ask a FA to select a random service member and reseat them in your assigned seat in J or F? If the flight was wide open, you could even then go back and find a seat in Y such that the beneficiary of your seat would never even know who gave them the upgrade. Truly anonymous and without reciprocal consideration. Think they'd allow this?