Sustainability isn't even the greatest concern: where there are customers (people who pay for access to the network) there is a database of customers (in order to allow authentication) that has to be kept out of the grasp of government agencies.
Actually, that's the great part about what we are doing: it is all built on Ethereum, so there is no centralized database, and the users are generally pseudonymous! OK, you might then say "isn't that just a decentralized database?", but in addition to a form of "probabilistic micropayments" that ends up shrouding most of the participants, we are also working on integrating other techniques to make the payments fully anonymous (and have brought on a team of advisors which includes a professor of cryptography who specializes in this area).
ICO
Not exactly, though I can appreciate why it might seem like that at first glance; we are selling a "utility token". This distinction is interesting and important as we are not selling a token to raise money to do development, instead having taken on seed investors to help us get the right team of developers and advisors to do this initial build out. The sale of tokens will be made after we have this network fully working and launched, meaning that we are really targeting a group of people you might call "customers" who will buy bandwidth tokens (as opposed to "investors", which is the target market of an ICO).
“This distinction is interesting and important...”
...and will be at the eventual inquest I’m sure.
How do they intend to make money?