Listening to the multiple requests, 3FN Marketing sets the minimum $50 required to start an advertising campaign prior it was $100. For details, please see marketing.3fn.net/bidding/. The Check Bids tool at marketing.3fn.net/bidding/check_bids.php allows verifying the current keyword bids. Registered users are also able to use the Traffic Estimation tool to approximate the traffic volumes for a particular keyword. All major credit cards and ePpassporte are accepted for making payments.