@Mike: How much were they, the referral rewards? I purchased contracts on the 29th of July and the 6th of August. It'll help confirm if you need to re-use the ref link for every contract purchase.

@Ritch: The Cryptsy exchange doesn't need to constantly withdraw and deposit, since the trades can be instant and you have your own addresses on the exchange to use, so use of bots on Cryptsy can be advantageous.

EDIT: I've figured out part of the referral system. Seems the ref award is based on 10% of the referred user's purchase. So if I bought a 40GH/s contract for 0.112BTC, 0.0112BTC is given to the referee. Short term this is great, long term it is disadvantageous. But helps keep affordability of upkeep in check.

EDIT2: I've used Electrum-LTC, and one of the things that bothered me about it was my addresses were disappearing but later showing up. Not sure if that was a bug or intentional security feature. Oh well, maybe I'll try Bitcoin's Electrum later on and see how it works. I like Multibit's featureset though, and am quite used to the User Interface