OneCoin has the best blockchain ever! I was curious and tried to find out how it exactly works and this is that I managed to know:
Block time is ten minutes and block reward is 10 000 onecoins (this is not going to change). Amount of onecoins is limited to 2 100 000 000. So that means all onecoins will be mined in four years.
Apparently they don't have transaction fees. So after four years there are no incentives for miners to maintain the blockchain.