Module to predict prob. of a browser's conversion based on PVSVR & CPA
Work based on research paper - "Bid Optimizing and Inventory Scoring in Targeted Online Advertising" hosted here http://m6d.com/wp-content/uploads/research_Bid-Optimizing-and-Inventory-Socring-in-Targeted-Online-Advertising.pdf
See also Facebook Real Time Bidding Exchange Protocol https://developers.facebook.com/docs/reference/ads-api/rtb/