That's an Amazon user maintained list of low price items. The purpose of the filler item site is to answer the question: "What can I buy for $0.59?" That list doesn't answer that question.
Oh c'mon, now you're just submitting links blindly -- that's definitely not an official Amazon offering. That list is generated & curated by Amazon user "fargowifeandmom" and was last updated at the beginning of this year.