Thanks!
Well, my experience is some years a gesture (eg card, gift, etc) wasn't returned, then next year, things were the opposite! lol Or you might get cards/gifts/gestures from totally different people, maybe even strangers! The Universe can work in strange ways sometimes!! 
So just open up to Universe - you did your bit, if someone was rude or too depressed/busy/miserable to send a card (or maybe too eco and not into the 'materialistic things') it doesn't have to mean anything.. Personally I prefer 'no gifts' and 'no cards' these days.. I do think of my friends and still love'em, it's just the clutter/zero waste thing..
So just open up to Universe - you did your bit, if someone was rude or too depressed/busy/miserable to send a card (or maybe too eco and not into the 'materialistic things') it doesn't have to mean anything.. Personally I prefer 'no gifts' and 'no cards' these days.. I do think of my friends and still love'em, it's just the clutter/zero waste thing..