Per your linked article: "Thanks to a decades-old Supreme Court case, e-retailers operating outside of a state’s borders cannot be compelled to collect the sale

Per your linked article: "Thanks to a decades-old Supreme Court case, e-retailers operating outside of a state’s borders cannot be compelled to collect the sales taxes owed by their customers. For years, Amazon.com took advantage of this provision." Amazon was specifically not cheating; they were following the law. The same law as other e-retailers and catalog retailers before them followed.