What did they do specifically? Like what information did they require on a case and what was the result?
unless you hand them the evidence and all the documentation. the answer to the question is nothing. the most they would do is search the forums and post history of the accused and gleam information from other people. and claim they done all the 'investigations' bt wont take anyone to court or anything of the sort.
average joe could find out the same info they would possibly gleam from the internet. purely because "they" are also "average joe".
what is needed is not average joe, sitting in a basement that paid a fee to be a P.i. but we need to find people that were or are:
police officers (able to perform arrests and gather evidence)
military (able to do alot of foot work to locate and surveillance the accused)
lawyer (to be the accused's prosecutor)
basement dwelling armchair activists need not apply
Would my service be of any use. $50 and the person's name, number and address, or as close as you can get to that information, and I provide (if you need it for legal reasons) - full ssn, dob, 10 year address history, names, numbers, place of employment, emails, social networks, property and vehicle information (vehicles the person owns, license plate #'s, vin #'s, etc), and more.... would this be of use and worth it. I have far more access to information than the "average joe". I run a fully licensed business and we investigate persons and companies daily.