Read the rest of my post :) Reasonable = Break even - which is all I ever hoped to receive, I only did it for fun and as a side project. When I implement the premium features I suspect to increase this given the amount of interest and my experience with other similar games.

Games like this are based solely around a community, people get friends on these games so don't wish to leave - the game itself is just an addon to the community.

Oh, and its more than $20, I think people must just be clicking as they want the game to survive or something - I've no idea. Not to mention I'm getting spammed with evony ads. I also suspect having a very direct advertising target helps, compared to other sites which often have a very broad market and thus struggle to advertise.