As a commentors above pointed out, online market share includes Airline sites, etc, and Delta alone is a top 5 online purchasing site. Show me what “Amazon had

As a commentors above pointed out, online market share includes Airline sites, etc, and Delta alone is a top 5 online purchasing site. Show me what “Amazon had 38% of online retail market share” actually means. That they have 100% of 90 areas measured and 0% of airline ticket sales?