There's a number of people who's priority isn't PvP so Dedicated Servers wouldn't necessarily be in the top spot, framerate/graphics and content would be. Those that do (or those that play PvE and PvP equally) may have higher on the priority list. Hell there are some that would rather get rid of PvP altogether judging from my poll results.
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PvE profits from dedicated servers as well
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People tend to make Dedicated Servers out being solely a PvP thing. Either way some of the more PvE oriented players may still list other things as priority.