What does Yahoo! put on it's toast? Jam?

There is some forum discussion taking place that calls out some pay-per-click (PPC) tactics being used by Yahoo!. In the simplest definition, "jamming" is positioning your click-bid to force the advertiser ahead of you to pay the most possible amount for clicks.

Does it happen? Yeah. Is it an efficient practice? Not if you consider the time required to monitor this tactic in order to ensure your fellow advertisers do not counter-atack by lowering their own bid just below yours. That does not leave much opportunity to grow campaigns and research new methods. There are other ethical questions that I will leave for you to ask yourself....

An interesting point was presented by "rustybrick" at Search Engine Roundtable: "Yahoo! Finance is a completely separate division from Yahoo! Search Marketing. Yahoo! Finance, as well as Yahoo! Real Estate and so on, are all huge online advertisers. I am 99% sure they run on separate budgets and have very little to do with each other, outside of being under the same company name. Keep in mind, Yahoo! Search Marketing was once Overture, it was then bought by Yahoo!".