If market conditions are such that you get no allocation (or choose not to bid), your traffic still has bandwidth available to it. The data streams of agents that do not bid (or do not win any allocation) are generally funneled through a single, shared amount of permanently allocated bandwidth. This bandwidth is shared by all buyers who fail to get allocations. Ask your Merkato administrator how much bandwidth is allocated to this “best effort queue” so that you can make the best decision of when to stop bidding on the low end (see Budget Valuation with Limits).