Firstly, they want to maintain the relationship with their friends and relatives. And Christmas cards are an easy way to let others know about their situations á well as know hơ their friends are.
Secondly, they send cards to give their kindness to the other, They are the ones who never cross off people just because they don't hear back in a few years.
Lastly, some people are too busy with hustle and bustle, and Christmas í the time they can relax, write and send Christmas cards to remind the others why they celebrate holidays.