From their website, they appear to both provide services to talk to inmates (of which I have a few friends from my time growing up in a poor, crime infested neighborhood) and to act as a data broker about the prison system and inmates, something I've had a long interest in and is related (tangentially) to my professional work in data analytics.
I won't be using their services either, neither as a communication method nor as a data supplier, and will try to steer any companies I work on data analysis at away from using their data.
In a "Three Felonies a Day" (http://www.amazon.com/Three-Felonies-Day-Target-Innocent/dp/...) society the odds of your ending up in one or the other position are probably greater than you think, certainly greater than you hope.