Originally Posted by
JetAway
UA has been doing this for years, even on international flights (with a co-pay) with no discernible effect on “complimentary” upgrades.
It will take away from short-haul upgrades that are advertised for less than $100 as it would make a first-class upgrade between 5,000-10,000 miles. Those not educated on miles (once a year flyers) would most likely take a 5,000 mile upgrade even on a 30min regional flight for the "experience"