There are people who are genuinely interested in learning the concepts, and then there are people who are merely looking AFL and back-testing. Some of the latter kind of people are simply looking for a "system" that gives buy and sell signals. People looking to understand and bet on VSA are very few.
I trade using only VSA. No fundamental, no news, no moving averages, nothing at all. I have started to be profitable only in the recent times. I first made an attempt to learn VSA in 2009 but lost badly. After a gap of almost 3 years, I started again in the month of May. Initially won some, but eventually lost. Then I started studying VSA concepts again, and this time from a different book named "Trading in the shadow of smart money" by Gavin Holmes of Tradeguider(founded by Tom Williams, the master himself). This is a wonderful book, far better than Tom's first book(The undelclared secrets that drive the stock markets). In this book, Gavin Holmes has nicely illustrated the various circumstances in which trades are setting up.
If you want to "discuss" any chart on basis of VSa concepts, I am always there. (but desperate people who are looking for mere advice on what to buy/sell will not be entertained)
And to not allow the news affect my trading, I am trading in something which is hardly reported or talked in the media!
The interest in VSA seems to be lower probably because it is not as easy as it seems to promise. It requires lot of patience and control over your emotions. Further, since there are few takers for this system, there is no "ecosystem" in which beginners can learn and grow. You have to do it all by yourself here!
Even though there is a central place called VSA club managed by Tradeguider, the fees are simply too expensive to encourage beginners.