Ann: Exploration Update Overflow Prospect NSW, page-10

These are joint venture projects, the terms of which are in the latest annual report.

So if they get good hits alchemy retains ~20% stakes in any mining activities (free carried through to production too I believe). These are very well orchestrated deals by Alchemy which mean the company pays its ~20% project Capex once the mine starts operating out of half the profits going forward. 

This is a longer term view as any mining activity won't commence for a while. However Aly will report on the drill hits when they are released by the majority equity project holders in accordance with ASX guidelines. So you'll see the SFR and hermes south drill and project progress reports here too. 

Tldr: potentially free money + stake in a mine.