Let's talk about advertising links

What is and what isn't ok.  DPU had posted the chow needing a home with a very prominent link to the photographers website.  Apparently Jaime ok'd that, but it looked like unallowed advertising regardless.  I don't THINK that I removed it, but I could have.

I think we need to really discuss what does and what doesn't constitute an allowed link.  He's fussing now in the Donaldson thread about a video that was linked being nothing but an ad for the GL and has mentioned that all the CM links should be not only disclaimered, but disallowed because they advertise CM.

Maybe I'm the only one who isn't clear at what we should and shouldn't allow?  If so, someone needs to fill me in.  But, we do need a clear and consistent policy on this stuff.