After making a reservation with Reserve America I got hit with a $64.95 charge from "The Active Network". I got in touch with them after I found the charge on my AmEx Jan. 16. When I talked to their agent I asked how this came about and if I failed to uncheck something when making a reservation to Topsail SP. He didn't answer but, became somewhat rude as though offended by the question. He then said something to the effect, "I am refunding your money. What else do you need?"
At a later date I went online with Reserve America to make another reservation. Then, I saw how they route you to this Active Network site and it appears as a final, trivial step to complete your reservation. It is easy, if you aren't careful, to get yourself signed up.