Such code would be a trade secret though. If a cola drink's secret sauce recipe was just a single plant in the Amazon, the name of that plant is in the public d

Such code would be a trade secret though. If a cola drink's secret sauce recipe was just a single plant in the Amazon, the name of that plant is in the public domain and cannot be copyrighted, and the plant itself probably can't be patented. All they have is knowing what it is and not telling anyone.