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This is definitely the bottom of the barrel type link. You're not going to get penalized and it's not risky, but the time you spend working on an article that will go on a site like ezinearticles could be better spent on higher ROI link building. Plus, I read that ezine experienced a huge traffic drop with the most recent algo update and have talked about putting nofollow on article links.

Does your site have a lot of unique content? All of my clients experienced increased rankings. They're ecommerce based sites with unique products descriptions. Some of their competitors that drop ship are using product descriptions from the manufacturer and they all experienced a drop in the rankings.

For example, the Chrome/Firefox mozbar uses peid (Root Domain External Links) but the api doesn't allow this. I've done a little bit of reverse engeniering and it looks like the accessID for the mozbar (when logged in as a pro member) is "pro-xxxx". Does this mean that each pro account has its own accessid/secret key? If so, when will pro members have access to that?

I've created a tool that I use for deciding which expired domains to buy and it uses all of the free metrics - but I find myself having to do one extra step to get the peid (navigating to ose). It doesn't make much sense that the metric is available to me when I'm using the mozbar logged in as a pro member (which I pay for), but not apart of the API.