"also prevent mainstream medical Science from testing it and eventually promoting it."
They will never test it anyway because the Genie is out of the bottle, and the pharmaceutical companies can't get a patent on it. They are the only ones that can afford legitimate testing.
"If this is actually an effective treatment for diseases, then we need empirical evidence and solid testimonies from cured individuals "
There seemed to be plenty of evidence from people in Africa, and surrounding countries in regards to Malaria, and Humbles friend in Nevada with Cancer was also evidence.
I don't think it cures anything, but like Humble said, it gets rid of the bad guys in your system and strengthens your own immune system so it can fight whatever disease you might have. That's powerfull stuff on it's own.