New York Stock Exchange Runs Trades On Red Hat Linux (InformationWeek)

I'm not affiliated with Red Hat in anyway, still, I think that calling Red Hat's service
subscriptions as "tax" is unfair or impropriate. By all means it isn't comparable in any
degree to M$ offerings, which are very binding by nature and thus makes switching very hard or
in worst cases practically impossible. This is the significant difference.

Secondly I really wonder, how a financial organization can run any critical systems without
payed support, either internal or external. Here the difference is that the organization can
hire couple of Linux kernel hackers, but not the other way.

In other words "tax" plays down to free beer -thinking, which is just wrong.