Implementation does not have to wait 341 days, they will have stream of Ethers coming in and they can make progress during the ICO. And once they finish first version, then each day will bring even more Ethers so each EOS will become more expensive. It's almost like having permanent huge sell wall on exchange for 341 days. I like the way Dan designed his EOS ICO. It's the most fair ICO of all, however it won't bring super profits to investors as with limited one day ICO.