I have tryed Rank Tracker service but very disappointed as there is no SEO or SOCIAL stats in their service that show anything. I asked for a refund as not showing any relevant stats. They have agreed to refund but two weeks now, No Refund, No Replies To Emails.
They seem to take your money and do not refund although it states clearly on their site there is a 7 day money back guarantee.
I think GSA Ser should be careful who they recommend, I have no idea why people do not want to give a refund.
It is part of your service on any site, do not go to these people choose another service.