The parties who "benefited":
- People who withdrew XCP that they bought before closing (this is the 7000)
- The hacker, who is up +80BTC
The parties who were unaffected
- People who did not have XCP on poloniex
Ideally, people who withdrew would deposit funds back into the exchange, the BTC would be redeposited, and all trades reversed, which would result in no one gaining or losing anything. However as this is not actually practical, the exchange is currently soliciting donations to try to cover the remainder.
That's the current fund situation right now.
Thanks for the good assessment of what happened at the exchange.
I'm encouraging those who benefited from the low XCP prices and withdrew the XCP to offer to return it to the exchange.
It might have looked like an fortuitous turn of events in your favor. However, you now know that it was caused by a bug in the protocol. It is the right thing to return what was not really yours to begin with.
If you decide to keep your windfall, know that you are benefiting from the misfortune of someone else in the community.
If more than 70% of the shortfall of XCP is returned to the exchange, I will personally donate 100% of all of the XCP that I would have lost (ie all of the buy orders which filled during the dump) to a bounty or donation fund for XCP.
Edit: I decided to lower the barrier from 80% to 70%
These are the address of the people that withdrew XCP before closing of poloniex (this is the 7000):
Tx Block BlockTime Destination Amount
4638 286727 1NCsouKcyJUsTMKtFastR6R5epE9GeYT91 Received 200 XCP
4637 286727 1Q3Ar2m347z3mDEryyQbywZCXerXLKAqyh Received 71.08910852 XCP
4636 286727 1K859HgQvCCYHAMdGkU96tf9wYj1dhGogn Received 1938.9 XCP
4635 286727 1BJiJVhvKGZPXYBUTEseQ48fwCDZ84BeCx Received 6 XCP
4634 286727 1LArq4ZstbNo2Dcq3dg7QdtoTpvizsX52h Received 126.21410657 XCP
4633 286727 18WLz4AxTRVhJ5TGQzAPTL3vEYMtJSzJSX Received 497.97347705 XCP
4632 286727 1Ljx3T5AV8izV58UepcoYAqWsHuxi6cFAC Received 7.9 XCP
4629 286726 17yzh4iz8dsYRgWWkm83HYHZtgXqC31rzC Received 3568.9 XCP
4628 286726 1L2RvHFHoviCzk2CVJWhyKKYh8kzo3sbnq Received 59.9 XCP
4627 286722 1LArq4ZstbNo2Dcq3dg7QdtoTpvizsX52h Received 1183.7369884 XCP
4625 286722 18WLz4AxTRVhJ5TGQzAPTL3vEYMtJSzJSX Received 5.9 XCP
4624 286722 1C8dJGH96QAg5SBdtkJm9WDQ3bb9H7tPbb Received 170.59999931 XCP
4623 286722 17yzh4iz8dsYRgWWkm83HYHZtgXqC31rzC Received 9.9 XCP
I think Busoni needs to check if these account are holding BTC and "hold them" + check if these accounts have xcp left in poloniex and subtract them. (of course after checking that these users benefited from the 35,000 xcp sell)
If the individuals who hold these addresses do not return the ill-gotten gains to Busoni, they are much worse then free-riders as they are profiteering from the hack at the expense of others in this community.