bidding on keywords – Which companies are best in your opinion?

I know that many have used AdWords by Google, and most know about Yahoo. But which other companies do you recommend?
Someone I know was asking about this, and they had recently started a goclick campaign. The bidding was low for keywords BUT, something seemed a little odd about it. Within less than 10 hours the budget was burned up.
I had made a IP and Http_referral to track it for him.
I noticed alot of referrals coming from sites that dont seem to exist.
Another suspicious thing was that his site was averaging 5 clicks PER SECOND .. and not just now and then, but consistently until the budget was burned. Looking at the IP and refer list with a time/date PHP function I made for him.. you can look down the list and see from 5 to 10 clicks per second.
Im wondering if […]

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