Bid4Spots Launches Bidding Tool

Los Angeles-based Bid4Spots, a reverse auction marketplace for unsold radio ad inventory, has rolled out a new bidding tool for its customers. The firm said Wednesday that its PowerBidder tool allows general sales managers to enter rates on bidding against multiple auctions. The firm also said hit reached a milestone of 1,000 of its auctions, and $2M in auction winnings. Bid4Spots provides reverse auction markets for radio airtime, used by radio stations to fill unsold airtime.