Is this program a scam or is it legit?
I have no idea. After waiting for 400kB of useless Flash design to download, it sat there doing bugger all and I left the site fuming at clueless web designers.
What does it do exactly? A summary would be helpful in answering your question.
http://2by2.net/Member/PersonalWebPages/faq.asp
Basically, you pay money to set up websites, or online malls. If people buy products through your site, you get commission, and if you get people to join the program, you get money.