A service like this already exists - zapchain.com (bitcoin instead of ether). I have earned billions of satoshi on it but well, it is failing.
Because identity could not be solved with partial blockchain, same mistake Akasha is doing.<p>An identity is a proxy for past work done, which the identifier further wishes to use as a proxy for future working. A blockchain bypasses this by directly asking a proof of current work, irrelevant of past work done.<p>When a system does not use an exclusive blockchain, the identity is unable to proxy itself through PoW. Spam rules zapchain now.<p>To make this work they need a PoW Akashacoin.