I went ahead and signed up for Hashzone with your link and look forward to giving it a try. I have used Hashflare and it has gone well but not spectacularly. I have been reinvesting all profits trying to get to the kind of holy grail amounts that such interest/earnings rates (0.5-1% per day) can produce. I'm not sure it ever really adds up that way but it is money I can afford to lose.