Why "open-source" means "free to distribute"?

[Guilherme C. Hazan]

Hi,

Since my last thread was little deturped from the main question, i'm
starting another one.
So, people stated that "open-source" is "free to distribute".

But GlueCode's license is OSI-certified and their license is clearly
distribution-limited:
http://www.gluecode.com/website/html/prod_licensing.htm

So, what's the magic here?

thanks and regards

    guich

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