I design my own card ,usually with a picture of our family, which I send as an email attachment to most people. It's not the cost of cards (I too always buy charity cards )but the extortionate postage .I do make an exception for people whose email address I do not have,the elderly and neighbours (hand delivered).The considerable amount of money I save goes as a donation to Cancer Research Uk, a cause dear to my heart .Its perfectly possibly to print off and display such 'cards' as an above poster days .Surely rhe important thing is tgat oeople are remembered at Christmas and know you thought of them ?This way I do not see it as yet another task to be done I do not understand those people who have their cards bought, written and addressed by now. Its hardly a spontaneous, joyful good wishing is it ...
I used to do a Round Robin as I can't see the point of keeping in touch with people you never see unless they know something of your current life (and you of theirs)And individual letters would take time I never had while working. I would type them and add personal bits at the end(I tried not to make them too envy inducing ,despite my perfect life-not!) I no longer do this as am in regular email or Facebook contact with most people I know