Open source VS closed

[eluser]Developer13[/eluser]
[quote author="Brad Martin" date="1304700183"]if i go with open source i dont want to be screwed by people who think its ok to pirate the software.[/quote]

Ummm... what? Then why make it open source? Do you understand the point of open source software?

I'm not so sure I see anything wrong with the open core model. Keep the core of your app free and open source, and sell the modules which provide the good functionality.