I know some marketing is necessary just to get an initial user base. But after that, with a sufficiently awesome product, wouldn't the strategy of spending your effort converting existing users into superfans who promote it for you be effective? This approach appeals to me, especially given my limited resources.

It would be nice to have someone in charge of community management and marketing, but I don't have the money to pay for it without taking investment, which up until now I've been resisting.