Can anyone teach me how to download Ducknote wallet ??//...

Where is the huge hash coming form?

Extremepool and Minergate remains around the same level while alternative pools like .fr lost most of their hash.
Some "secret" miners?

  7 satoshi price! 200K $ market cap - to da moon duck, to da moon.

poloniex and bittrex

sounds good...

I don't push my pool often, but this is too good an opportunity to remind that fees are only 0.75% on http://duckpool.mooo.com

Everywhere. Today duck touched 9 satoshi on Bittrex. Market cap is stable up trending and daily volumes are above 10K $ - best CPU coin to mine!
We are on 20598 block, it is 1400 blocks before halving reward, in less than 4 days XDN rewards will come from 160000 to 80000 - is that right calculation?

Guys, can someone please tell me how the reward penatly mechanic exactly works?

This is a VERY interesting case and I would love to have an explanation for it, rather then absolutely luck.

This shows the recent blocks and as you can see, there are few blocks with "low size" and those blocks have no reward penalty at all. The remaining blocks with high sizes are all penalty blocks, varying from 30% to 90%. 
The thing is, ALL of the penalty blocks are found by extremepool and ALL of the none-penalty blocks are found by someone else. Can this really be just a coincedence?