Yahoo will no longer require a minimum bid of 10 cents on some sponsored search keywords, according to the company's blog.

Rather than relying on static minimum bids, Yahoo has adopted a slightly more complicated system that it says resembles an auction house reserve price. That means the price for a given keyword will be reached through a more dynamic process based on the quality of the advertiser and the value of the keyword.

According to a report on TechCrunch, some advertisers have already complained that the change has prompted a spike in the price paid for keywords.