A good niche can earn you $300+ from 5000 uniques. That would be with about a 10% clickthru rate. I have sites that easily do that.
UPDATE! So far success in the first day! I am taking things slow and only spending about $10/day or so, just to run some ROI tests. Here are my results: Spent: $9.20 for 484 visitors Earned: $21.29 from YPN+ValueClick That's a 131% return on investment. Amazing and a ton better than I expected! My CTR was roughly 5%. In fact, today is turning out to be an even better day than yesterday. Spending $5 so far today I've been able to turn it in to nearly $15 and I still have 12 hours left. Over the next week I am going to spend my final $85 on this test and then I'm going to do it again, but with a couple of zeros tacked on to the end. So instead of spending $100 maybe I'll spend $1000 and see where it gets me. I'll keep this post updated as time goes on and give you my final result of the initial $100 and what I turned it into. E