What biazar tells is perfectly valid, and those are purely technical issues with the coin code. There are actually two major (and separate) issues, listed here in order of their severity (in my view):

a) some nodes are extremely more lucky than others. It means they get staking rewards much more often than others, regardless of their balance. I cannot be sure, but I assume those people were smart enough to modify the code somehow, and found a way to get more rewards than others. I suppose they are good programmers, and it is a challenge for a programmer to find the exploit they use.
b) the masternode payments are not enforced, so some stakers do not pay to masternodes at all. It could be either because their node is not reliably connected to the network, so it doesn't see masternodes, or because they modified the code to ignore the masternodes. By coincidence, most of those stakers are the most lucky ones

I believe those issues are purely technical (because it actually is one of the main innovations offered by cryptocurrency - the invention of technical methods to make it impossible for individual players to cheat), and it would be nice if someone finds the way how those cheats were applied, and most importantly, finds the way to fix this (make cheating not possible) with a wallet upgrade. Most surely this will not cause consensus change, but rather an enforcement of the existing consensus rules. This is a really good challenge for a really good programmer

P.S. I don't specifically refer to brakmic above... I suppose the people who made possible those hacks, might have an idea on how to modify the source code to make cheating impossible. It would be nice for them to post a fix and finally change their black hat to white one. In any case it doesn't make any sense to cheat here, on a coin which is close to extinction due to lack of exchanges and community support. It is much more sensible to help it grow, at least to protect one's investment..