Are you sure of the points you are making? If you review the announcement of 2nd January 2018, it clearly states that arrangements are in place that enable them to increase their stake from 51% to 90%, for cash payments to Retec, and share payments to both Retec and the original vendors of Plosmosas. And that the remaining 10% for Retec is on a free carry basis unless mining commences prior to December 2018 (which it has), at which time the 10% becomes fully contributing/dilutive.
A clear pathway to 100% also exists.
https://hotcopper.com.au/documentdownload?id=uOMxKKzFkiWRTLKhOROKAxjvTDYC5Qm9wRmZo%2B11ke92GA%3D%3D