The problem with this program
-all websites belonging to the network are low quality, spam type blogs. No one is going to submit a high value blog to be filled by the rehashed , promotional , spam articles filled with links that you send them. Therefore, you get much better value if you submit your articles with links to already established article directories, or squidoo lens, or other parasite hosting, that have some search engine juice and it will flow it to your way, than sending articles to newly created spam autoblogs, where all posts are full of links to other websites.
-second part, about you getting free content. People PAY YOU if you let them publish articles with links on your blog, articles written by them. (You can find plenty of these customers on webmaster related forums, given that you have a decent website, a minimum of pagerank) So, where is the advantage in having your blog filled with useless articles, rehashed, filled with links... and you are not even getting paid for that?
Think about what i say, and if you are not convinced i'll shoot more explanations.