[evunveot]

> To Google, these images aren’t on your site, they are on - wpengine.netdna-cdn.com

I'm curious why the OP thinks that matters. The only thing I can think of is that you don't necessarily benefit if another site links to or hotlinks a particular image of yours (though I wouldn't be surprised if Google recognizes where the image originally appeared and does give credit). And it seems like any minimally reputable site that wanted to use your image would download and rehost it themselves.

> The problem is you have effectively orphaned all of your images to a worthless subdomain on NetDNA-CDN.com, no bueno if you’re trying to get some image traffic from Google.

How does that prevent you from getting traffic? If an image on your page comes up in image search, Google still shows your site's domain and links to your page for everything except the "View Image" button, and if someone clicks that, they just want to download your image and presumably don't care about your actual site at all.