I'm actually surprised that so many get offended over Thank You cards in one way or another. I don't go to many parties now, but when I still lived in the town I grew up in, it was a weekly event. Most everyone there had the same mindset. A couple just starting out, or expanding their family probably needs every dime they can get. Why pay to send out a card that's going straight in the trash? A heartfelt, verbal Thank You is more than enough & more financially feasible in most cases. I do remember one of my 1st cousins complaining about not receiving Thank You notes. No problem. People just quit inviting her & her attitude to anything. I suppose that made all involved happy. Personally, I've never given anyone a gift expecting or even wanting anything in return. The joy is in the giving, not in the response the gift receives. Oddly enough, I have filled out many Thank You cards for flowers or other sentiments involved in losing a loved one. Until I read this thread, I never thought about how insane that really is. That was the one time in my life that I struggled with feeling gratitude for anything. I suppose they think the financial situation is different at this time in your life.

FWIW, I still wire flowers up there often for funerals. Most people don't even know our address. It never occurred to me that I should receive a Thank You card. I think having loved ones we can take for granted & get the same in return is the greatest gift of all.
Just as most things do in this country, this practice seems to vary by region. Noone is right or wrong, just different & we should all respect that.