Open Source

As we know, that right now every thing is expensive. If we can get every this free of Charge so how can we must pay the expensive one. Like Operating System, every one know majority Operating System that can cost us much money, the advantage is they support us every thing from problem till using that Operating System. But the advantage is every time, every people right know is doing piracy that againts the law, So why dont we use one of the Best Open Source that give us Free of Charge. One is Linux operating System. Right now there is alot of variety of Linux Distribution and alot of developer that he / she can spend some of his / her time to develop any feature of Operating System. so why we must pay if in some place there is a free one.