Hippie Tech, I believe the startjoin accounts are what one would call custodial.  Startjoin as i understand it is using a off blockchain ledger.  Deposits, rewards and interest are credited to member accounts not to a wallet the member/user controls private key for.  Of course if you withdraw funds they are sent from StartJoin to your private wallet. In other words only Startjoin has the information you are looking for. Blockchain analysis will not be very useful.  I suppose you could spin this negatively even though it makes total sense accounting wise to use a internal ledger (separate from the blockchain) on StartJoin to avoid startcoin sending fees and to efficiently settle all the back and forth funds within Startjoin crowdfund site.  

Perhaps StartJoin can find a simple way to be more transparent about coins coming into existence via non-mining. The info is available just watch the coinmarketcap website and follow the available supply of StartCoin. It does accelerate around Friday above the amount accountable by mining.
Last thing Hippie Tech, by the time you finish doing your due diligence Start is going to be so much more expensive!