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Well maybe this is a good time to stop using query strings! Sometimes Google has a hard time understanding which parameters matter and which are for things like sorting.  I'd recommend using mod_rewrite or similar to a) get rid of the query string and b) get the product name or keywords into the URL

I can't figure this out. For a number of search terms that I compete for, there are competitors that rank below me, but their pages are featured in a rich snippet.  I wanted to see what kind of structured data these sites are providing, thinking maybe there's something I can learn.  But when I run these URLs through Google's Structured Data Testing Tool, it tells me these pages contain no structured data!

So how is it that Google think's my page is more relevant (I rank higher) and I have structured data, but Google chooses to feature a different page?  Does anyone have ideas on how I can snag these rich snippets for myself?

They are hot linking, but I was more asking about the accompanying link to the image on my site.  If it's not clear, it looks like this:

I found a few websites that are displaying images from my site.  Curiously, they have also linked these images to the source image file on my website.  I found these because Moz showed these sites in my list of backlinks.  I assume that means it impacts my Domain Authority.  But does this actually help me in search engines since it's not linking to a page on my site?

Well maybe this is a good time to stop using query strings! Sometimes Google has a hard time understanding which parameters matter and which are for things like sorting.  I'd recommend using mod_rewrite or similar to a) get rid of the query string and b) get the product name or keywords into the URL