Apologies if this was answered, but how did you avoid the problem of people gaming the system? I'm looking at the "My Wallet Transactions" graph and in the last two days over a quarter million bitcoins were transacted, far in excess of the previous days' amounts.

I'm talking about someone who sends coins between two separate wallets to collect on the BTC reward (up to 1 BTC for anonymous sends). In theory, the current setup would allow someone to generate limitless profit (well, the limit is based on availability of anonymous send resources).