The first rule of Real-Time-Bidding, in order to win traffic, your bid needs to be higher.
So how much is high enough? This amount is changing based on many variables, but we advice in the system the best CPM to start with.
Our default CPM of $5.00 is considered to be a healthy position to start with. Raise the bid to ensure you are winning a desirable amount of the inventory to test with, or to scale on.
Since this price is recommended on our system, it should not be taken as absolute, simply because we cannot predict the price for impressions on specific sites.
Of course, you could always approach it casually, and start with a lower bid and gradually increase your bids until you start winning.
Once you start winning traffic, you will know your eCPM (the true cost traffic). The moment you have the eCPM, you will know what to bid on, based on first-hand data.
Regardless of what your bid value is, you will only win traffic if your bid is $0.01 above the amount the next highest bidder is willing to pay. This will be shown in your eCPM column, as it will reflect what you are winning traffic versus the default bid, which you should consider the maximum amount you wish to pay.