You will make more than $100 a month if you put the time into it.. As I said Ive made about $130 in a few days, but i spent $40 to make that ($170-$40=$130). I put a ad in the paper and bought 5 yard signs(strategically placed along roads), and bought 25,000 hits (which breaks down to 900-1200 unique visitors). theres no way of tracking which was most affective but it still worked.....

You also can sell adspace. There are Pay Per Impression, Pay Per Click, Pay Per Popup/PopUnder/ExitPop, and some others...

I made $3.00-$20.00 a day from 3 Text Ads/2 Banners/Google/Psuedo-Popup. Its a wide range because with traffic exchanges you have to view other websites to get credit for others to view your website.

Think about how this website runs..im sure he makes good money from that one simple ad rotation, it keeps the website up....

Its a hobby, you have to enjoy it...