How did sherpas 'poison' climbers at Mount Everest as part of ₹186-crore insurance scam?

Nepal police charged 32 individuals, including Sherpas and helicopter operators, for running a $20-million (₹186 crore) insurance scam at Mount Everest. Sherpas allegedly 'poisoned' tourists by adding baking soda to their food, causing severe gastrointestinal symptoms mimicking altitude sickness. Sherpas then pressured climbers into taking expensive emergency helicopter evacuations.