Ads are automatically tacked onto the end of each outgoing email.
Advertisers pay in advance for advertising traffic, and are given an email address to submit the ad.
Before the ad is run, it must be approved by a lists.nu advertising manager. Once an ad is approved, it will continue to run until your ad account is out of money. At that time, you may refresh your account and the ad will resume. Ads are limited to four lines of text of maximum 79 characters per line. Those ads targeted to particular mailing lists have priority over untargeted ads.