Although the redhat is approximately valued at 33bn, but does RHEL is truly open source? Can you study, edit, modify the source code, the freedoms a user get when the software is licensed under GPL. Selling support could only be posible for enterprise or is it actually possible for direct consumers, although that's possible. I think that would give a bad rep for the company? Is it? Sponsored development is actually like a donation based model, where you can except new features when you donate some money. Customization for big enterprises is actually a viable business model, only if it generates as much money as the company sustains and can continue to expand? All of the other things you've mentioned goes against the principles of free and open source? Correct me If I'm wrong!

Hey, thanks for the great suggestion. Looked onto it and it's great to build your own linux. I think that's really the essence of linux, the freedom to build it on your own.