I've all but given up on Yahoo PPC. I had some money sitting in the account and decided to pare down my keywords and try some new advertising copy that has been working very well at AdWords. Yahoo went way over budget ($40 per day budget, average $65-70 per day ad cost). Also, only one conversion.
I started checking into my web log stats to check out where traffic was coming from and most of the yahoo clicks came from pure advertising spam sites. I did not have content clicked on, just search. Yet the searches that were sent were from off the wall search engines like landing.domainsponsor.com, searchportal.information.com, which all take you to information.com, or as.starware.com/dp/search, dp.qsrch.com/apps/eps/eps.cgi, park3.ireit.com/index.asp,
www.leatherjacketsdirectory.com, Plus a number of more sites.
I've never looked at any of these sites and I've never even heard of these sites, yet, each one of the sites sent at least 5 people or more to my website in about 3 days. Plus, despite the budget analyzer telling me I was good for about 5 days of search, I was charged 2 more times within 3 days of advertising on Overture services (That's $300 without a sale). Maybe it's just me, but I can't figure out how anyone makes money advertising with them. Adwords is tough enough to make a buck on, but this is out of the realm of reality.
I can't imagine a budget of just $3 per day, that would last about 10 minutes on Overture and less than two hours on Adwords during the day.