My parents are in prison for child abuse. Even though I now have a good relationship with my repentant mother, I still don't send a card. She didn't raise me, she has completely failed as a mother, I'm not celebrating that aspect of her personhood. (No contact with my father, so it's a non issue.)
The grandparents who tried to raise me, sometimes I remember to call, sometimes I don't. But even when my grandfather was alive, I didn't call him because at best he was a clueless, disengage d jerk; at worse he was emotionally abusive. I didn't owe him anything.