Because when old users like me purchased the product licencse 2 types of options were existing USD 97 for the license fee and then USD 27 per month for using platinum feature and second option was USD 297 for lifetime purcahse.News users are exposed to new pricing structure and have the benefit of no one time license fee (USD 97) but directly they can use the software @ USD 37.
They’ll show you information like how many external links the site has, the number of Facebook and Google+ shares, estimated visits per month, and its page authority. All of this is valuable intel that can give you insight into where your page could potentially rank against them, without needing to do more research with a separate tool or on another page.
It would be great if you can provide comparative analysis of this tool with Google Keyword Planner. Since you’re using this tool so you can provide best comparison. One differentiation which I understood is that this tool works for yahoo and bing as well whereas Google keyword planner works only for Google but Google being a dominating search engine, gives the highest returns, so only this reason may not be enough to buy it.