Why does the Travel Industry not make profit from Duty Free?

Can anyone explain why the Travel Industry does not make any money from Duty Free sales, when every purchaser needs to buy a ticket first?

Australian Duty Free on Arrival expands to Chinese and Japanese markets.

The Australian Duty Free retailer in Sydney also continues the expansion of the Duty Free on Arrival concept by launching their online pre-order service in various Far Eastern languages.

Who will be the next Country to expand into the Arrivals Duty Free and online purchase market, Switzerland or Canada?


Where can you buy on arrival...check with

http://www.dutyfreeonarrival.com/
http://www.arrivalstravelretail.com