Here is our final decision:
1. Bonus algorithm:
You may not like our Bonus algorithm and if you don't like it no one is forcing you to claim it. Users are notified about exact amount that will be subtracted from the balance and there is a specially designed confirmation screen where user confirm and agree with this. DuckDice shall not be liable for users who don't read confirmation screens.
Many members in this thread gave us their insight on how Bonus algorithm should work based on their opinion and we are very grateful to all of them. We may use this expertise in the future but this does not mean that current algorithm is flawed.
2. Refund:
DuckDice will not "negotiate with terrorists". We see this case as a pure blackmail and therefore DuckDice will not make any refund. There is nothing shady or scammy, it is user's responsibility to read confirmation messages. Better make a thread and ask how many members won big with our bonuses.
3. Solution:
The initial deposit of user Ozafejyw782 was 2 BTC and we will give this 2 BTC for charity. Transaction id will be added shortly
We have a negative trust because of this case now, but this doesn't frighten us, we believe that our position is correct and we will just regain user trust.