They should be refunded instantly, since the coindash team has the whitelist address ETH total I think anyway.
They should not refund whitelisted adresses as that would be extremely unfair to all other participants. Only 'fair' way to refund some of the ether would be to re-distribute it proportionally to everyone (so including those that send to the fake address from their mainpage).
Other option is issuing worthless tokens to everyone. I guess we're screwed out of at least part of our money either way.