Open Sourcing Logos
logodust.com
logodust.com
Once the logo is no longer unique to a thing, I don't see much value in it.
Anyway, there's not a huge value in logos for most businesses beyond quick recognition and expending a minimal amount of energy probably outweighs global uniqueness in many cases.
I assume one wouldn't want to use the logo for the logo of a business, as it already has a "free usage" copyright...?