AdBrite ad campaigns – What’s the hold up

I opened an account with AdBrite last Friday, and created a campaign. For targeting I added about 50 keywords, left demographics and categories open, chose preferred sites, and USA geographic targeting. The ad didn’t get approved until Monday (3 days). Since then, the status has been shown as "running," but there are no impressions or clicks. Is this normal? When can I expect some action?

Original post by JMo