Hi Roenstein, I'd like to learn more about your account details to see if we can help address your concerns. Please email your Ask Sponsored Listings account number to me and I will investigate further. If your distribution has been modified, the issue sounds like it is CPC bid prices and relevancy related, but I will know more once I have a look into your account.
Regarding our network, we have many customers who run successful campaigns on our network. Part of their success stems from customer feedback such as this. Researching the refers listed above have been helpful as we maintain our efforts to provide a quality traffic source.