Ninja-mining was used to counter ICO: https://bytemaster.github.io/article/2016/03/27/How-to-Launch-a-Crypto-Currency-Legally-while-Raising-Funds/

ICO is by the way 100% premined.

However, it was a mess, since some miners got lucky to mine a huge amount of Steem. The purpose of the Ninja-mining was to secure fund for the development through a foundation (STINC).

STINC is selling huge sum of Steem every month at whatever price for distribution.

The bottom line is there is no fair distribution, it is a myth. The free, equal sized airdrop to early adopters will end into few hands eventually, since mass will sell to few strong hands who will get skewed amount of asset.

My argument was those who are too vocal on unequal distribution have no intention to take big stake but complain.