All of the money comes from selling STEEM and SBD on exchanges and to users man. Its pretty simple- you create a product that has actual uses (STEEM token) and give it a market place to buy, sell and trade. The value comes from its usefulness as a tradable commodity and social impact through the Steemit platform.
RE: ATTENTION: there is no income for steem, so the project value is going to zero. I invite all steem fans to tell me how steem earns money itself.