what is the purpose of doing POS reward scheme in a random position?
By doing that we can control the inflation caused by most of high pos coins...
People usually dump their staked coins cheap when there is a high pos on few blocks on a throat, they lock their wallet and unlock it at high pos blocks and maximize the most...
By doing that small bag holders had fewer chances of getting a bonus block...And when there is a random every wallet have equal chance to hit bonus block