@dahat: Corporations like Google and Microsoft piss away money to keep from paying income tax.
Let me rephrase:
How many people who have an average personal revenue thought your software was worth any money?
How many people chose to buy your software instead of a nicer BMW or a trip to the Bahamas?
Getting a few emails from sparse people who thought it was useful is not a good metric so please stop using that. Every developer on earth can claim that.