Correctly interpreting female behavior is a PUA technique as well, one most men don't do very well, nor do they know how to react to what women do.
One guy got a three-year relationship with a woman because I taught him to recognize a "shit test" and told him to ignore a woman who had stood him up. Another I told to stand up a woman who had friendzoned him, and to tell her that he got laid but forgot to call her to cancel. In each case, men used specific information to change the outcome, with absolutely no boost to their looks or other advantages. That is hardly "bullshit." That the internet allowed everyone to steal these ideas is what made them "worthless," not that they lacked intrinsic value.
The reason the PUA community got scammed was that, beginning around 2001, it refused to pay for anything, and those who had anything worth paying for stopped sharing, leaving the market for the scammers.