http://www.continental.com/onepass/n...0020801_01.asp
I'd call that an expansion--Silvers now have a benefit they didn't previously enjoy. All Elites can now get complimentary upgrades to Business or First Class when purchasing a "Y" fare. Upgrades are available months in advance, and come out of the "A" or "C" inventory.
Why not reward those Elites on the most expensive tickets?
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I am not a sanctioned representative of Continental on these boards, just an interested participant.