I thought it may have been a DMD, but instead it's a flightscope website
I gather the $99 is to have your shots assessed. Or perhaps that's for a fitting. Or maybe a lesson using it as a tool to refine your swing.
From what I understand $99 gives you an hour. The pro takes you thru you entire bag so you find out the average distance you hit each club, spin rates, launch angles etc. Doesn't include fitting or lesson from what the newsletter says.