I have a new Banner Exchange Network that I am promoting. If you sign up now you will get 1500 free credits. There are a number of categories to help you target your audience better.
The exchange ratio is 3:4, this allows me to give the free credits to new members. For the first 6 months, any "extra" credits I have available I will be distributing throughout the network.
If you have any questions or suggestions for categories, please let me know
