Dec. 2 was an extraordinary day for Amazon.com Inc., the mammoth online retailer: Cyber Monday sales reached new heights, its fanciful plan to use drones to make deliveries was creating buzz — and then the U.S. Supreme Court spoiled it all by turning down Amazon’s challenge to online sales taxes.

That perfect storm may explain why the Supreme Court’s denial of certiorari in Amazon.com v. New York and the ­parallel case Overstock.com v. New York made such big news, even though the issue of taxing Internet purchases is far from resolved.