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It's definitely a judgment call.  There is legitimate reasoning to have a link to the widget author/creator if it's a single link.  And providing the option to not have the link be there helps.  Yet it's not 100% clear that Google does or does not penalize for this.

I liked that strategy, use it for a year to get leverage and then just let it expires. By this and the other posts here looks like that getting listed in the directory isnt really worth for me at the moment. Thanks for the opnion guys