Be very cautious about any conclusions from an analysis based on cash costs per ounce. Arguments based on the new guidelines for a (nearly) uniformly defined "all-in sustaining cash costs" are better, but one must still adjust these. Arguments using cash costs per ounce can be close to meaningless, there is so much cap ex and costs of the company omitted.
Not trying to cast doubt on PVG, just on some views expressed in that article.
JMO