ok, assume that there is no new hardware added the 48 hours before and after the difficulty increase(hypothetical) if slush's pool will find fewer blocks after the rise in difficulty who is getting the difference? if you are saying that there will be an overall decrease in blocks, well yeah, we were making too many per day, although it is probably only a fraction of a block per day. Everyone's per day income may go down, but not noticeably because it was going down everytime new hardware came on line over the last 2000 odd blocks. the difficulty has no immediate effect on income.
No.
During the 2016 blocks periode, the global (hourly, daily) reward is rising, as the global hashrate is rising. The (global) frequency of finding block is rising, so is the global reward. Reward for each block/share/MH/s is stable while the difficulty is constant. I.e., miners' reward is stable too, as long as their hashrate is constant. New miners/workers get equal reward per MH/s as the old ones, thus adding to the global reward increase.
At the moment of re-targeting, when difficulty rises, the number of shares to find a block rises instantly. That is, each share, each MH/s, gets less from that moment. So does the whole network. The global reward per (hour, day) drops with the ratio (old difficulty new difficulty). This way it compensates for the two weeks' rise, trying to restore the standard block periode of 10 minutes.
So, the reward of a miner with constant power, who had been getting constant reward for last two weeks, drops instantly too.
Yes, the rising global hashrate is the real
reason. Reason why the difficulty must rise. But the reward
drops appear at the moments of re-targeting, while
during the 2016 blocks
individual reward is
stable and the
global one is
rising.
So: No, the reward is not
going down everytime new hardware came on line through the 2016 block period. This accumulated rise in power is compensated for at the moment of re-targeting.