My opinion - Stuttering can't be "cured" in the sense that it has a neurobiological basis, and there is no drug or therapy that can guarantee you effortless forever fluency if you have that neurobiological difference. But, another major truth about stuttering is that it is variable. That means it can come and go across days or across life eras. It can disappear completely for some people, and can re-appear too. The struggle part of stuttering is also learned, and when the struggle diminishes, people sometimes experience milder or less frequent stuttering moments. As we get into adulthood, most people figure out how to manage the stresses of life, including worrying less about their stuttering, which contributes to the experience of stuttering becoming less or even going away for some people in adulthood. So neither is stuttering "for lifetime" - it can and often does change over the decades of adulthood. Many "scammers" are people who for any of the above reasons, plus whatever techniques they were conscious of using, their stuttering went away. Then they feel like they have the cure, because something seemed to work for them, and if it worked for them, it can work for anyone. Most are well meaning. Example, Steve Harvey has videos on You Tube saying that stuttering can be "cured" for anyone if they practice talking to people in a mirror, not looking listeners in the eye, rehearsing every message to themselves three times before speaking, etc. Lee Lovett says that if you practice avoidance techniques faithfully, you will not experience stutters, then your confidence will consequently normalize, and ergo you are cured. My opinion is that avoidance and effortful techniques to control stuttering are not likely to be mentally healthy in the long term, especially if you continue to feel anxiety about doing them "right" or shame when they don't work. It's not fluency per se that's really valuable in communication, but sponteneity. Better to work on the fear of stuttering, desensitize to it, allow it to happen, work toward changing the ingrained belief that it is bad to stutter, cultivate good overall communication skills. Then you'll be in a better, more mentally healthy position to eliminate secondary behaviors or use modification techniques to make the primary stutter easier - if needed.