Ann: 4N (99.99%) HPA successfully produced, page-101

These figures are simply not realistic.
The current HPA price is high because of the lack of supply and increasing demand.
Historically, others have relied on expensive high alumina-content metals to boost feedstock grades and in turn, the end product purity.

With a cheaper source and more volume entering the market, the selling price will drop.
You can't flood the market with millions of tonnes when the global supply is expected to only be 200,000 tonnes by the end of the decade.
Let alone any other company that plans to enter the market as well.

It's a great addition for the PFS to get extra revenue and is secondary to the main resource.
It doesn't matter how much supply you have if you can't sell it.