I was once a holder, and have sat on the side for a long time....

I was once a holder, and have sat on the side for a long time. The question that always bothered me was exactly that - whether the resource was any good. I have long suspected that they can't market it for some reason - impurities maybe - I don't know.
They did ship off some samples at some stage - don't remember what the story was there, but all did not go well as far as I remember.
I hope for holders it is just the price of rock phosphate holding it back, and that MAK come good once the price lifts, as this may well happen.