Magpie is an ad network for Twitter. Advertisers sign up and create campaigns which consist of magpie-tweets (i.e. ads). Twitterers allow Magpie to post magpie tweets among their tweets and for them to get paid for it.

Ad.ly a Twitter advertising platform

Ask friends to sign up for Ad.ly using your special referral link below. When someone signs up using one of your links, you will earn 12% of everything they make on Ad.ly.

RevTwt is a system that enables you to monetize your tweets.

The RevTwt referral program is a great way to spread the word of this great service and to earn even more money with your Twitter account! Refer friends and receive 20% of their earnings for life!

Sponsored Tweets is a Twitter advertising platform from the same company that operates PayPerPost. Sponsored Tweets allows you to embed ads in your Twitter stream and get paid for it.

TwittAd was formed to give Twitter users and advertisers the opportunity to meet for product placement & website promotion on a Twitter user profile. TwittAd gives advertisers templates and ideas to help keep the integrity of Twitter background images.

PayPerTweet is a Twitter advertising platform that connects advertisers to Twitter users. Users will only tweet ads that are right for them, their followers, and the client.