Most open source software companies make money on service, closed source IDEs, hosted versions, etc. I'm not aware of any company that makes good money selling actual software that could be downloaded or given away by a competitor legally for free. If you're selling .exes, then I wouldn't open source unless you were prepared to switch business models.

FWIW I think open source software is a great thing but in general a horrible way for any sizable corporation to try to make money.