All fine, but will the witnesses also raise money for development of the ecosystem? At some point the Steem stake of Steemit INC is finished, and then? Bringing a chain into a bright future costs a lot of resources, and resources are being paid in the normal fiat world. Enough fiat shall be available to give Steem a future without becoming irrelevant at some point in time. I didn't see ANY proof so far the 'community' can handle the tasks required. We definitely need some form of organisation for that, wether that be one or more groups of people, project teams, or even better, companies, like Steemit Inc is a company. Decentralisation sounds great, but I don't know of any decentralised product that made it to the top without using (more or less) centralised planning and execution.

Whether contracts will be used, or some form of trust fund, or whatever other form to safeguard investments into the development of the Steem eco-system, it all ok for me.