Sure, that might be how people discover servers, but they are more likely to stay on a server when they make friends and party up. 🙂
Personally I believe that group play should be encouraged while any form of solo play should be nerfed in some way. It doesn't make much difference if the entire server is soloing while doing trains in IT and FoG or if they're soloing by killing mobs 1 by 1 in varka/ketra, people will farm until they're burned out and then quit. They need to find ways to promote the social aspects of this game.
By the way, do we have any idea when the advertising will start? And also any estimations on alpha/beta? Would be nice to have enough time to thoroughly test a lot of the theories on this thread in practice.