They are sending regular e-mails so the income potential is there. They are sending steady e-mails now, so this is a company that should sign up for. They also have games, cards, and other extras. They just signed a bunch of new advertisers, and the e-mails should start to pick up. This seems like a really good company.
Thier ads are actually interesting because they use shockwave.
You can also earn credits that you can use towards prizes. When you sign up you get a free web based e-mail account. You get paid for each page view you do when looking at your e-mail account. There are ads on each page, and you can get paid up to 10,000 page views per month.