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Hmmm... I'm seeing the Knowledge Panel for your brand for searches on both "tacticalgear.com" and "tactical gear" (which is generally a good sign), but, as you said, no Google+ (just Twitter). This is a bit of a black box, unfortunately, and a couple of networks disappeared a week or so ago. Many others seem to shuffle. Your structured data looks fine, and your G+ page is successfully linked to your site. So, you've got the right signals in both directions. Your "sameAs" data even checks out on Google's own structured data testing too. Unfortunately, this may be a weird query-time phenomenon that doesn't have much to do with what you have or haven't done. Everything looks by-the-book to me. As Christopher said, you could try to put up a couple of text posts (and not all videos), but at this point it's probably going to come down to some trial and error. Sorry, I know that's not really an answer, but I suspect you're in that frustrating territory where you've done everything you're supposed to and Google is either midway through changing the rules or making some real-time decision that we can't see.

Good question, isn't it? I wish somebody knows exact answer, but I'm not friends with Matt Cutts From what I heard, read etc, my understanding is that Google knows websites, who are selling links, by simply reading the content and links on that website. Example: if website has a page with prices for articles with links or press releases, Google bots can read that content and understand what the page is about. Then they look at how many of outgoing links on website are do-follow, how often they appear, diversity of those links etc. Basically, if 99% of outgoing links are do-follow and they are all to different domains, the picture is pretty clear. If picture is not clear enough, bots would send a request to manual action team.