Each brand is trying to find a way to get a leg up on the competition in a tight market space. The above picture is what I found on my last grocery run. What caught my eye was the asterisk next to the non-GMO popcorn claim. My guess was the ingredients list would include soybean, canola, or corn oil.
The temperature for broiling in an oven is 260 degrees Celsius or  500 degrees Fahrenheit. Medium heat is about 177 degrees Celsius or  350 degrees Fahrenheit.
Broiling Basics. Preheat the broiler to a high temperature, usually 425 degrees Fahrenheit or higher. Place the salmon skin side down on a broiling tray or on a baking sheet, and position the oven rack to between 2 and 5 inches from the heat source.