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.
Once I have a list of phrases, rankings, and volumes from these tools, I'll look to internal tools (maybe Excel, Access, or another database) to organize, classify, and forecast opportunity. This is where I'll estimate a competitor's traffic based on volume & position CTR, set goals for a target position, and estimate traffic based off that position's CTR and keyword volume.
In a nutshell, Long Tail Pro helps you quickly find keywords in bulk based on a seed keyword that you input.  In addition to returning hundreds of related keywords, the tool also shows search volume (monthly search volume), advertiser bid, number of words, rank value, and my favorite Keyword Competitiveness (helps you judge the competition and keyword difficulty).