A lot of these are logos that I had assumed to be registered trademarks. As such, they would only be usable under the terms of a licensing agreement with the ow

A lot of these are logos that I had assumed to be registered trademarks. As such, they would only be usable under the terms of a licensing agreement with the owning company, terms which I had assumed would be pretty anal-retentive regarding the exact details of the representation. IIRC, Facebook has a specific art package with specific image files that one is suppose to use, and no other. On the one hand, this is pretty common knowledge. On the other hand, none of the responses so far have brought it up, and the logo website itself seems to think that the cited sources can license the use of the artwork in question. I do not quite know what to make of this.