Blackcoin's distribution was terrible...it was instamined. BC had a 1-week distribution period where 99% of the money supply was instamined by the creators who paid to rent out all of the hashpower and mine all of the coins, then since they controlled almost the entire money supply they traded back and forth with themselves pumping the price and trading volume.

Mintcoin actually has the best distribution of these style coins as it was released first, and was the most profitable coin to mine while it was still mineable, has already great merchant adoption. Don't be fooled by the pump and dumps.