I'm one of these people. I deposited some coins, and put out some bids, I think some of them were lowballs. I don't know what got filled. I never withdrew anything. Currently my poloniex account balance shows no BTC and no XCP. Much sadness , it was nearly enough BTC to buy a new car.

I would be happy to donate some XCP or BTC to the recovery effort. And certainly I'm happy to have any trades reversed on poloniex. But it would be nice to get something back.