Originally Posted by jetsetter
I was not particularly saying that I should have been upgraded, although of course I would have preferred that outcome. However, CO and the others, do seem to treat customers on a transactional basis. Hence them looking at what you paid on this particular ticket, instead of say the total revenue you have brought to CO in the long term. It is curious too that people seem to have such better lukc with NW upgrades. Why would NW apparently have such a more generous upgrade policy, or conversely not be selling as many revenue F seats? Personally my NW upgrades typically clear days ahead of schedule as opposed to CO which usually clear 0-1 days before the flight even as Platinum. And even though the op had top status and bought an expensive ticket he was treated kind of like dirt anyway by CO at EWR with no special elite or VIP handling, etc. He would have probably been nearly as well served to buy a ticket on B6 or WN for $75 to Florida

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My 2 cents.
NW uses upgrades as a strategy for FFers. Since you have flown NW in business, you realize that not too many people would actually pay for NW business. CO, on the other hand, has an excellent business class and likes it when consumer actually pay for it. So, I would rather have a CO upgrade than a NW upgrade; but that is comparing apples and oranges. Different stratgies towards making profits.
Note: NW is in bankruptcy and CO isn't.