You would probably be better off in affiliate marketing, either by trying to figure out some decent PPC arbitrage (really hard to get nowadays, but oh so sweet if you can) or some decent CPA deals that will have a high conversion rate on your site.
It will certainly pay better in the long run.
For instance, you may want to run ads for software that you would recommend. Whilst you won't get paid for every person that clicks the ad, you'd get a pay out for every person that buys.
So instead of $0.05-$0.09 every 3 visitors, you'd be getting $2.00-$5.00 every 50 by PPA or $20.00-$30.00 every 200 by PPS.
i.e. We sell a competitor to MS Office, called Office One, via
Office Download Center - ONE Special Edition - It pays out $20.00 per sale. The incentive for businesses to get it? It's a hell of a lot cheaper than MS Office, it's fully compatible, and it has a few more features in built.
It actually does quite well with businesses that are looking to get away from being reliant on MS.