I think the opposite argument can be made -- Red Hat makes this business model work, and they're doing pretty well. Also, if in the future open source becomes

I think the opposite argument can be made -- Red Hat makes this business model work, and they're doing pretty well. Also, if in the future open source becomes the norm, not the exception, then this will become moot -- the fact that a company is based on open-source will be considered typical, not an outlier.