Pay per impression advertising networks

Hello everyone. I would like to ad on my site ads from PAY PER IMPRESSION ad networks and i would like to ask if buying targeted traffic to my site could help increase my revenue.

Thanks
George

buying ptc and old domain traffic, even if it is targeted, will cause really low convertion rates, and no decent network will pay for it. If you have any way of driving quality traffic that is likely to convert than go for it, but usually the arbitrage will be preety small if any