Originally Posted by
ajeleonard
Equally passengers who paid for business class tickets could be aggrieved that you bought a premium economy ticket and upgraded with miles
... or even more aggrieved that there are passengers who paid for an economy class ticket and are getting a free upgrade to J.
An upgrade with miles is a different story b/c that's part of the program and subject to some rules, just like J passengers are on tickets which cost different amounts and come with different restrictions.