It does, as the BTC balance is 0 after every div payout
Previous div payments are not relevant as Ken said he would withhold 50% of the
new revenue and we haven't had a payout since then.
My guess is yes, the Bitcoin income is the same as last week meaning it includes the added hashpower, if this address had no new hashing power it would be a lot lower.
In short, the added hashpower has gained us a week.
Yes, this is the only address that we send mining revenue to. We will be reserving 50% of the new revenue for growth and expenses.