It may be because RTG only hold a 40% interest
Extract below taken from RTG's June 2020, Quarterly Report
RTG Mining Inc. (ASX:RTG, TSX:RTG) (“RTG” or “the Company”) holds a 40% interest in Mt. Labo Exploration and Development Corporation (“Mt. Labo”) which holds the high-grade Copper and Gold Mabilo Project in the Philippines.
