Again...holistic product manufacturers could make a killing on a product like this. Billions are spent for herbs and vitamin products every year. Consequently, the big Pharms aren't a significant issue in this matter.
By not getting in on a product that "claims" to take on one of the most deadest foes against humanity to public access - would be insanely naive on the part of major business interests who cater to the public that only produce and sell over-the-counter drugs.
Would companies involved in health care products blow off selling aspirin because it's not patentable? I don't think so. As cheap as aspirin has gotten. It's still called a miracle drug and is extremely profitable even with off brand suppliers.
If this product made its way to the market place as a holistic food supplement and thousands came forward with verifiable proof that were cured of cancer. The big Pharms would be kicking themselves in the ass for not getting involved. If nothing else it would pay for the big pharm's travel expenses for their reps who are selling designer prescription drugs.