Why all the volume...Good question. I don't know the answer and can only offer cautionary comments based upon my knowledge of the principals of the company and their past practise. In some respects this might be unfair because the reputation of a group can represent a negative bias - I have to admit I carry that.
They appear to have some credibility with this association with deBeers and they are milking that for what it is worth. Perhaps this is a chance to do a PP at a higher value and raise more capital. Perhaps they want to pump and dump their own shares for a tidy profit. Perhaps it is all of the above.
It is anyone's guess at this point.