"In the proprietary world, software vendors make their money
from the bits, Red Hat doesn't. Red Hat's model is all about
support and adding value to the bits with services. It's a model
that 10 years ago seemed odd to some, but Red Hat has proven them
wrong haven't they?
At various points in time, Microsoft, Sun/Oracle and even other
Linux vendors have attacked Red Hat and tried to steal or erode
their share. To date, those efforts have had little success on Red
Hat's bottom line.