If every wow player was to take this flight path one at a time, it would take longer then the average life expectancy in the U.S.
10 million subscribers spend 5 extra minutes on a flight path.
= 50,000,000 minutes
= 833,333.33 hours
= 34722.22 days
= 1141.44 months
= 95.12 years
~ $14.99 per month for subscription ~
= $17,110.19 in subscription fees overall for people to travel.
tl;dr - blizzard makes a shitload by making you wait longer to travel
ps - don't take this seriously