“obtained at signup” and just then your signup page goes offline ??
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Also I cannot see any mention of external links “when activating the plugin”.
It even seems the goingup-web-analytics.php has well hidden such code and there is even no mention in readme.txt, plugin description or the plugins home page.
Also I would doubt that such -8000px; hidden link trinks would work on Google. In fact your www. forex.sc is on page two for the keyword forex trading. Besides this could theoretically even hurt your websites rankings because of placing obviously user hidden links that are not even niche related.
As for “don’t use the free version” you have no mention anywhere about a payed version of your WordPress plugin.
