Product of the year?

And so this is a sample of our "Product of the year". I still do not get it. How is this done? Open-ended questions? A list of brands people chose from? How does one go from one round to another? Based on how many votes? What's the surveying method? How is the sample chosen? Are people asked more than one question? How did one arrive to the category? What was done to curtail the sampling, inquiry and "willingness to please" bias statistically?... So many questions on this very shady logo. Do note that many of these products are distributed by the same company or holding, and several have the same advertising agencies.