The long tail ones get 1000-3000 uniques per month, and earn $5-30 per month. These are random topics like feng shui decorating tips and electric model trains.

The long tail ones get 1000-3000 uniques per month, and earn $5-30 per month. These are random topics like feng shui decorating tips and electric model trains. I hired someone in the Philippines to write articles for $1 each and put 20 on each site, then used RSS to keep updating them. The big earners (if $150 is big) were in travel and shopping and these get 8000-10000 uniques. In both cases a few articles rank well for a keyword. One article on airline miles outranks the airline's site, and one printer review outranks the manufacturer's site. So I got lucky there. The goal was to build thousands of these sites, so that $10/mo average x 1000 sites would be a nice passive income. I may get there, but right now I only built a dozen.