We are facing a lot of open source software.

But someone needs to write that software. How are they payed?

Do you know a good article about the open source politics and economy?

Sometimes the big companies themselves release open source because they have some benefits. Then they sell support, advices ...

My question is what is the real economy about open software? No professional will work for nothing. This software are couple of classes but thousand or may be millions of classes. If you are really a pro you will write software for money, because you have life, wife, kids, taxes, you must earn. Please do not tell me that they are doing this for pleasure or hobby!