FWIW, I'm leaving the pool. I can't afford to do all those shifts with no payout. Not sure why it had to change, but if I see:
We've been lucky for a while now and having higher than average expected payouts. Everyone can afford that. You're complaining while you're winning. Stop it.
Shorter shifts: For 24/7 miners there is no change. You get the same amount of coins. At the same time. It's exactly the same. If you mine for two hours, it does not matter whether you are paid 0.2 BTC for the first hour and 0 for the second, or if you are paid 0.1 BTC for each hour. It's the same 0.2 BTC being paid out to you. Don't get emotional about that one hour with no pay (even if you did put your back into it). It's the number on your balance that matters.
Take a look at
https://bitminter.com/stats/rewards - at the bottom graph you can see the expected line flattening out at the point we changed to shorter shifts. That's because the earnings per shift are lower now that there are more shifts per day. See how the actual rewards graph at this point started below the expected, but kept moving higher and higher. That's you being paid better than the average expected pay that mining calculators give you.
I can assume the last 11 shifts were for nothing.
You can never assume anything about the 10 latest shifts. Those are the ones that will be paid if we find a block in the next moment. And you don't know whether we will or not. Some people think they do. But they don't.
The eleventh shift was showing zero pay though. That can happen if it takes a while to find the next block. But overall today is a great day. We are having good luck and getting high payouts. Most miners today are counting their coins with a big smile. Do you really want to focus only on that one shift that didn't get any pay?
Would it help if the shifts were a little longer so instead of 10 shifts with big pay and one with zero, we would have 10 shifts with slightly smaller pay (and no zero pay shifts). We'd get the same coins. Your share of the coins would be the same. Your balance would show the same number. Your pay would be exactly the same. But we wouldn't have a zero showing on the shifts page.
Here's the thing: almost all the work we do is for nothing. Out of 35 billion proofs of work only a single one is useful, because it produces a block. Mining seen from a different angle: if you're not finding any blocks then you are getting paid for doing nothing. Only skysmichaels and 2doo did something useful today. All the others got paid over 2x regular mining pay for nothing. That's not bad.