Many of the issues no-spec brings up (ie: mostly misleading the designer about potential reward) are not present on 99Designs and contest sites, as people knowi

Many of the issues no-spec brings up (ie: mostly misleading the designer about potential reward) are not present on 99Designs and contest sites, as people knowingly compete in contests for exact terms up front, not for potential jobs. The brands you mention are priceless, but the logo is not. Nike's logo was cheap as hell, for instance. 99Designs serves a completely different market, and I think the "How much is a F500 Company's brand worth?" argument HEAVILY confuses marketing, design, branding and advertising.