Originally Posted by
SkyTeam777
You're absolutely right, but for those that switched and were on the bubble anyway. They either saw a bump or didn't.
I'm not sure what you mean here. People aren't "on the bubble" in general. you might be on the bubble for a given flight, but the next time you take that flight, you're not flying in the same conditions, so you can't just say "well I got the upgrade this time with the card". There are way too many other variables.