There's a huge difference here though: steemit was literally a pre-mine situation. Koinos mining was open to everyone at the same time. I'm sure the team mined some and probably even bought some on uniswap, but, those were the only two ways to obtain the Koin erc-20 and everyone was on the same playing field. It's about as fair of an initial distribution as you can probably do. Most other new cyrptocurrency projects just outright issue themselves tokens at genesis to later dump on the market. There's no doubt that some professional miners got involved pretty quickly, but, it looks like they sold most of what they mined based on viewing wallet history on etherscan.

It's probably also worth noting that none of the team involved with Koinos were the individuals responsible for doing the pre-mine on steem (this was before my time there but is documented publicly in various articles).

Lastly, Koinos actually is still immune to such attacks because of proof-of-burn. In order to have an influence on governance you have to actually produce blocks (similar to how BIP's work on bitcoin). In order to produce blocks, you have to actually burn your stake. So in order to perform an attack you'd need to acquire 75% of the stake and then burn all of it and produce blocks for quite some time to effect governance. It's literally built to avoid the "steemit effect" scenario. If you haven't had a chance, check out the new unified whitepaper that was recently released - it goes more in depth on this topic (it's a pretty good read at a minimum, even if you don't care about the project itself).