Everything I've heard (unofficially mind you, since they don't release this stuff) is that EQ2 is actually one of their better performing MMOs. Seeing the stuff on the marketplace and people buying it up left and right supports that idea pretty well. Figure every armor set etc. someone buys is $3 to $15 so on average a hefty chunk of a month's subscription. And whereas the main game team is needed to keep making content for that $15/mo they only need 1 or 2 artist-types to keep pumping out the SC stuff.
The fact they're willing to approve new hardware for the US servers is another good indication that EQ2 is making them good money. If they were planning to do away with it anytime in the moderate future they probably wouldn't be willing to put out that kind of capital.
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