Facebook recently introduced the ability for brands to increase reach for important posts and updates, but that reach comes at a cost. The prices varies depending on how many fans you have in your community. This new feature coincided with changes to the company’s Edgerank algorithm, which is how Facebook automagically filters posts in and out of your stream. Similar to how Google’s PageRank sorts results to better match your search intention, Facebook uses Edgerank to ensure that engagement is…