If you have submitted your Bid and have not heard back from the Marketer, there can be a couple of reasons why:
Declined by Marketer - The "Declined by Marketer" status means that the Marketer did not accept your Bid.
Deadline Missed by Marketer - The "Deadline missed by Marketer" status means that the Marketer did not act on your Bid. Once a Campaign has been filled, Marketers typically let the Bids that they did not accept expire instead of declining every one that comes through. This allows them to reopen the Bid if they need to fill additional spots for the Campaign later on. They are however being notified of all of the Bids that come through.