I've tested One Cent Content and I think it's very good for marketing purposes - if you review manually content, you can use it even in tier 1. And I've some ideas to improve it.
1. Currently, OCC scrapes and spin content automatically, but... would it be possible to include another step to "rewriting manually"? So, after scraping, I'd like to rewrite some phrases and expressions manually (in spintax) and, after it, content is auto spinned. It'd improve uniqueness and could get better tier 1 content.
2. Is it possible to define two spinning levels (high quality / good quality)? Some expressions aren't so OK but, if we had "manual rewriting" and "auto spin with high quality synonyms" we would have amazing content.