Originally Posted by
mikebor
Oh okay thx for telling me it isn't common. First class was half full and the plane wasn't full by any means but I don't think it needed weight or balance measures. I'm guessing the guy was super cool and was just being really nice. Just surprising he did it for me considering I have no status on the airline.
No problem.
United offers Complimentary Premier Upgrades (CPU) to its members with status. Since first class was only half full, either there were no premier members left in economy, or they were all ineligible for an upgrade on that trip (likely because they were traveling with a group / family; CPUs apply to a maximum of one companion).
It's nice to see infrequent UA fliers come away with a positive opinion.
I'm glad you enjoyed the flight.