No, not all PoS start with the creators having 100% of all coins. See Ethereum.
Close enough. Premined scam. (Edit for 60%)
In fact the presale was so open that it was drawing substantial criticism at the time. People were worried about the legal ramifications of them selling to literally any member of the public, without any KYC or vetting process. It was the polar opposite of selling to insiders.
That's aside from your metrics for the sale being wrong as well.
I guess technically if you had traded Bitcoin for ETH at launch and then back to Bitcoin before merge you could have made more sats than holding the sats alone. It’s true of many low cap tokens. But for anyone touching ETH since the merge, they have been burned.
We can marvel at the innovations introduced by the tech, yeah, contracts are interesting (yet still don’t seem to have a use case beyond accounting and tokens.. [primarily fiat stables]).