I cannot think of a single way to reach a fair distribution without having a permissionless-entry stage.
I mean, when he INVENTED coinage Croesus of Lydia went entirely the other direction: He said, "Here are tokens I give out to people who do me favors. Now all of you have to give me one every year, so you all get to figure out what favors you can do for the people who do me favors in order to get them to give you one... every year."
In one swell foop the guy invented currency, government corruption, and taxation. And, oh yeah, capitalism. But he didn't see that last one coming.
The point is, not only was it "Permissionless" entry, it was COMPULSORY entry into the market, fostered by everybody working under an unavoidable debt.
CfB doesn't have the power to compel people to use his tokens, so permissionless is really the best he can do.
He has already set a permission level at 1000.
In a perfect world where all people start off on a starting line at the same time with the same tools in hand, then yes, a permissionless system is the way to go. But that isn't the case, on this system all kinds of gate keeping policies will be set with this. Only people in the crypto world will know, and then among those only those that can mine, and then among those only those that have good methods of mining will end up with the lion share of his tokens. When he sets up a system of mining on his MS, he is basically only given permission to BTT people with good abilities to mine to participate.
That of course is not a hard permission, but it is a soft permission and the system has been rigged from the start to be so.
And again, he is going to cap it at "around 1000". He doesn't want 10,000,000 participating. It is clearly not an open system.
So once you have a system set up that is rigged due to the nature of contest that only some people can enter because only that select group are qualified, then all others don't have permission, whether it is a hard rule or a soft rule, it is a fact.
Now that he has a system of permissions, the best way to go about it is to set up the system in a way that insures the most widespread distribution avoiding sock puppets and concentrations of coins into the hands of 20 people. Just accepting donations from anybody via an IPO style launch or PoW alone simply won't do it.
The world needs proof, real proof, not some easily faked proof that there were 1000 participants.
CfB is talented enough and has more than enough money to make 1000 fake sock puppets via amazon and have them mine on MS and then have cryptographic proof that there were 1000 accounts, but that doesn't mean anything. It could still just all be his 999 sock puppets.
So any system that just requires one day of mining by any computer any where without restrictions is a system that I call bull shit on. And I will just be the first of many.