I write a small Mac shareware program. Perhaps the suggestion isn't aimed at me, but if I open sourced the whole thing, one person with enough knowledge could c

I write a small Mac shareware program. Perhaps the suggestion isn't aimed at me, but if I open sourced the whole thing, one person with enough knowledge could compile it and distribute to everyone else for free. I have little doubt that sales would be hit very hard. Web apps might be a bit more suited to it once they have momentum and users. If Facebook released its source code (security issues aside), it wouldn't make a difference to them -- people join and use Facebook because all of their friends use it, and that's got nothing to do with the source code.