[_3u10]

I guess you've never read the Open Letter to Hobbyists. http://en.wikipedia.org/wiki/Open_Letter_to_Hobbyists

The best thing to do is estimate the number of users and use it in the marketing. (eg. instead of 200 copies sold, say 2000 users, etc)

[bad_user]

I don't think a letter from 1976 best represents Microsoft's strategy from the 90ties or from today.

[_3u10]

My point is that piracy can be very good for small companies and is an indication that people like what you're doing.