This is a new service that works on two levels. On the one hand, it will let Twitter users get more followers, On the other hand, it will let Twitter app developers promote their work and gain more supporters.
The system revolves around purchasing impressions. The more impressions you have, the more featured your profile is on the network, and the more chances others have of learning about you as a Twitterer or developer.
The gist is that the money you invest on the site is actually shared with the Twitter developers in the network. As a result, you are not only gaining followers but also supporting those who are purveyors of new Twitter tools.
Any service that couples “Twitter” with “pay” generally falls by the wayside. I will give this one at least a partial thumbs-up if only because I think it is an interesting way to showcase new talent and promote who you are. Still, you must pay it a visit in order to arrive at your own conclusions.
FeaturedUsers.com In Their Own Words
“FeaturedUsers is a Twitter application ad network. If you’re a Twitter user, it’s a great way to get more Twitter followers and support your favorite Twitter apps.”
Why FeaturedUsers.com It Might Be A Killer
It is an effective tool for self-promotion and for supporting those who devote their time and energy to the Twitterverse.
Some Questions About FeaturedUsers.com
How much does this exactly cost? 
