They say that the very first postcard that was saved as a souvenir was one that someone from Vienna sent. Would be interesting to know what was written on it. Perhaps “wish you were here?” Anyway, today postcards are pretty popular and there are postcard printing companies. You can get customized postcards done at some shops. Some shops do business postcards too. Postcards have always been fun and easy to send. The man who is considered the father of contemporary marketing, Lester Wunderman, is also the one who came up with the idea of the magazine subscription card and the idea for the 1 800 toll free number.
Direct mail postcards are used a lot for marketing. In fact, postcard printing is used for direct mail marketing because this type of postcard marketing gets the strongest rate of return for B2C customers. Real estate postcards are also sent via the mail. There was a trend going on for awhile in the 60s and 70s where people were sending them out to open new freeways and industrial parks. However, the most popular types of postcard printing since the 20s, has always been for ones with off color jokes or bawdy and risque images. These would be need custom postcard printing.