High-rep pump sets with light or moderate weights at the end of a workout have been used for decades. There many different training-protocols leading to the same result, namely pumping up the muscle with blood. You can decrease the weights with every set. You can pump to failure. Do “100’s “ etc etc.
Renaming it as “FST-7” is only a way to make it look like a new concept and thus more marketable. What’s not new either, and just like what happens to bodybuilding itself, hard core extremists also push this concept to new level by adding SEO’s, peptides, opiates, silica and of course roids. More about that later….