An ice drop remains frozen in your account for the term set (the fill by date displayed on the ice drop wallet) and accumulates rewards. The difference is, these rewards cannot be withdrawn. To claim ownership of your ice drop, the final balance must reach 10% of a masternode share by the term set, after which it will generate rewards to be added to your regular share. All ice drops that do not reach the goal will return all user deposited coins to the users and the remainder to the project owners.