This is fun. I worked at a company that did something very similar around 2008. We had too much fun testing it out and I remember getting lots of ridiculous post cards in the mail from co-workers. I don't know that it was ever something that was likely to make much money, just one project among many at the company. Unfortunately, 2008 was a bit of a wrecking ball and we never got to find out. We had an iPhone app back then and my boss was skeptical that Android would ever really compete.