I think there should be a required amount of time to hold the bonds if someone pre-orders them. Otherwise they might just resell the at your IPO and you would then be in competition with the preordered bonds and the new ones you are releasing.
There is no way to enforce this. I've added a clause saying this is not an intended use case.
I will issue 5000 more bonds early next week.
The price will be somewhat lower than the last issue, to account for hardware advances and the increase in the BTC exchange rate, both of which mean that more hashrate can be bought per bitcoin.
I wonder if you already paid your current bond holders enough on dividends, so they don't go into loss when you will be pushing market price down while issuing more of these bonds at lower price. I don't hold any of these bonds, just curious.
I make an effort to preserve investor value, but there is absolutely no guarantee that the bond will produce a net profit over its lifetime. The market conditions change and the bond price will adapt, whether I'm issuing new bonds or not.
I'm handling this in the fairest way I know and it's impossible to please everyone. If I price it too high I may end up stuck with bonds nobody wants to buy (and lowering the price then would be even more problematic). If I announce a new price without any waiting period there will be resentment among people who have recently bought for higher. By being vague I'm giving people an opportunity to reassess their evaluation and act accordingly - but those people can end up unpleasantly surprised if the issue price turns out to be higher than they expected.
Two important events have happened since the last issue: BTC appreciation to the $6.5 level, and BFL's announcement of their planned ASIC pricing - which should be taken with a good serving of salt, but is still edible.
Anyway, to more directly answer your question - the total coupons paid per bond so far is 0.076534754 BTC (not including errors and compensation). So whether this is a profit or loss really depends on how long one has held the bond and how much he paid for it. The highest price the bonds were offered by me (correcting for compensation) is 0.4 BTC.
It also depends if you're looking at the profit of holding bonds compared to holding BTC or holding USD. Compared to USD I think it will be a profit for everyone who bought from me. BTC price affects the difficulty which affects the BTC price of a mining bond, so the position of holding a mining bond is positive but still lower than directly holding BTC, so people should expect not to profit as much from a BTC rally as if they were holding BTC.