Maybe for the first 5 days stage we can use regular servers, I mean without smart contract? We can launch a transparent site (ethereum blockchain explorer which is filtering one particular ETH address), so everyone could see all the bids. Then site would filter these bids as it shown in biophil's post. After 5 days stage is over, the smart contract starts.
BTW, if crowdsale will last for a year, when will EOS network itself start? After that year of eairlier?