MyPillow is conservative. Many of Amazon reviewers, and Amazon, are not. In this case I would take the reviews with grains of salt.
Well I’m not sure I agree and I would not sleep on a foam product because of out gassing concerns.
Amazon is pretty much the universe of people and reviews are not limited to the USA. I was very sad not to be able to get a mypillow because as you say the founder is conservative and I went to Amazon thinking I would support his company. At that point I didn’t even know it was a foam product. Luckily his company is doing great and others are happy. I just prefer to play the odds.