ZenithCoin like Auroracoin have a 50% fund.
Maybe Giveaway coin from a fund for all like a Auroracoin?
The big difference between Auroracoin and ZenithCoin (Other both talking about the Sky) is that all coins with ZTC have been mined fairly.
But I understand the idea of re-distributing 50% of the coins to somewhere. With ZTC we will be offering rewards for further development of the coin.