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Hi there, I have a client who wants to advertise in a local directory along the lines of "find your nearest plumber". The directory only has paid listings and they are follow links and they also mention your site or generated landing page may get a nice bump on google. Is there a risk that they may get a penalty for using this directory? The client wants to use it regardless of if it gives them an SEO boost but obviously wants to avoid any penalties at all costs. Thoughts on this? Thanks in advance