mrmp1: The surveys are iffy as far as making it all the way to the end to get credits. Unfortunately WGT does not have any control on what these outside vendors do. I would think that with all of your experience here that you would be well aware of these facts.
No doubt you are very adept at earning "free" credits since you have spent so little cash. I fully appreciate your frustration about completed or nearly complete surveys only to have them announce at the end that you failed to qualify. It has happened to me far too many times.
For a game that announces that it is "free" to play, it does seem that it has become harder to earn those "free" credits that are need to play competitively at higher levels.It is true that I can use the white rock at no cost, but I am then at a disadvantage to better equipped players.
Good luck and keep up the good fight to earn those "free" credits.