Send real card, and so much more
Have you heard of Blue mountain cards? Back in the 90's there was a huge rush of companies trying to provide online ecard services. I'm not sure exactly how they built a business model on the idea of giving away a free ecard, but they did. Business models based on advertising revenue were quite frequent back then. This is a difference with today's focus on real revenue. However, there are some painful similarities in web 2.