Forum Moderators: skibum
Burst:
Advantage is that it is about half of what Fastclick is in terms of price. But they feed the same popup over and over to the same IPs.
Ebay:
Popups can be bought for a song. search under 'banner ads' Disadvantage: Very low quality, usually served behind discussion boards. Absolutely no way to target anything.
Can't recommend any however as I don't purchase popups.