The recent Google’s updates regarding definition of a widget link pattern has been changed from it’s before definition that was quite broad. In this updates Google focus many more specific changes to make it clarify that what sort of link inn widgets ignore its Webmaster guidelines.
If believe the other source information on Widget link patterns used to be defined as Google as;
Keyword-rich, hidden or low-quality links embedded in widgets that are distributed across various sites…
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The major purpose of this Google’s update towards the link scheme to be disavowing the possible for distraction and ignorance a short less place for personal perception. Moreover the previous definition refers that any link if that belongs to Widget is simply part of a scheme, on the contrary according to the new definition disavow this state. Expect it define few facts that is likely to be in Google view a Widget link as spam.
Google’s Matt Cutts also warned against widgets upon link building plans, and also added how to use rel=nofollow there.
In his point of view they are not likely to ensure that your primary source to make links form Widget, and they prefer to must put the nofollow, specifically with Widgets.