I wonder if anyone had tried those High authority link like Huffington Post, INC, Techcrunch or so. Those links that cost more than 150 USD per post. Do those improve your overall SERP or are they really worth the money they cost. I see a lot of such service popping out at BHW recently. Just wanna know if anyone willing share more information of such case studies of this type of "expensive" links and their impact to a site rank. Thanks!