FAQ: Why we do it commercially?
First, we believe that only commercial software can continue to be developed in the long run. Without financial support, we cannot attract and keep excellent developers. Your investment will help us providing better products and services, which in turn will benefit you in the long-run. This is a positive circulation. You are helping us to help you!
Second, as GNU.ORG suggests (can be accessed here: http://www.gnu.org/philosophy/selling.html):
Many people believe that the spirit of the GNU project is that you should not charge money for distributing copies of software, or that you should charge as little as possible - just enough to cover the cost.
Actually we encourage people who redistribute free software to charge as much as they wish or can. If this seems surprising to you, please read on.
The word "free" has two legitimate general meanings; it can refer either to freedom or to price. When we speak of "free software", we're talking about freedom, not price. (Think of "free speech", not "free beer".) ...
Distributing free software is an opportunity to raise funds for development. Don't waste it!
In order to contribute funds, you need to have some extra. If you charge too low a fee, you won't have anything to spare to support development!
That's why we do it commercially, we need the funding for further development!