I don't see why you can't have both. The thing I found with SE, is that your users break down into 3 categories. 1. People who answer questions..these are your

I don't see why you can't have both. The thing I found with SE, is that your users break down into 3 categories. 1. People who answer questions..these are your biggest fans, who love the site. These are the guys who you build the community around. 2. People who come to the site through Google, these are your drive byers, they just want to see the answer. 90% never go past the landing page. 3. People who encounter a problem in their life. Need a solution, can't find anything on Google, and remember that your site exists. #1 is where you grow your community. #2 is where you get your money and potential new users, and #3 is where you spend your money in order to build up your brand identity. Why would the 100 people get 100 crappy answers? They'll find the same results through Google, as they do by going to your site directly.