The original BANX was a PoW coin that was released in 2 phases
First of all, here's the BanxShares ANN: https://bitcointalk.org/index.php?topic=813191.0
The things you're saying don't match what Mark Lyford says in the official BanxShares announcement.
The first day of the ANN thread, Mark says there is no mining at all for BanxShares. When were the 2 phases of PoW? Before the coin was announced?
In the first post of the ANN, it says BANX can be bought at Alcurex.org and Banx.io. No miners deposited any BANX at Alcurex. All of the coins were deposited by Mark himself, because the coin has been 100% premined supply since it was announced.
Mark did say that there was mining previously, but that it had already been cancelled before Day 1 of the coin being announced. That doesn't make any sense, and I don't see any evidence that anyone ever mined this coin.
He claims that 45,000 coins were mined:
But if that is true....
How did they end up with almost exactly 6 million, AFTER that? Another dev might shed some light:
5,400,000 + approx. 45,000 doesn't equal 6,000,882. They just picked a number and made that many coins, no mining necessary.
Besides, he later says that the coin is 100% premined:
And if you click that link, you will see that 6 million was the original intended number of coins, before any of this happened.
Interestingly, the prospectus says that they will allow miners to mine 10% of the coins, with only a 5,400,000 premine.
That's the number the other dev was using, but Mark just forgot about that part and accidentally admitted that all 6,000,000 were premined by Banx.
The coin was launched in October 2014;
These numbers were put together in July of 2014, so they were already decided and have nothing to do with any miners, forks, exploits, new wallet versions, or exchanges.