Same in Myanmar. There, people with stroke are given small doses of Python liver/pancreas or some sort as part of traditional medicine. I'm quite surprised to see that there's some sort of medicinal application to snakes.
Scientific studies do not not prove anything. They provide evidence for a hypothesis. And one study is not sufficient to draw conclusions from,especially with a sample size of 9.
What I heard was that actual snake-oil was used for a number of things it actually worked on in china, but when someone tried to introduce it in the US, the salesmen figured it was complete bs and no one would notice if they just sold counterfeit oil.
That last part at least is correct. Clark Stanley (the original snake oil salesman) traveled around with a bag full of snakes, and made a big show out of rendering them into oil. But the actual product was just beef fat and some other ingredients.
[1] https://www.biomedscidirect.com/1195/python_fat_effect_on_co...