I'm sure if I lived in Perth and asked for a tour of the plant that they'd be willing to oblige. Whilst they may not devulge specific quantities of graphite and hydrogen produced, the piles of the stockpiles would say something. Unfortunately their pic of the graphite did not provide anything included in the photo to show scale (a standard protocol). If the plant has been producing at optimal level for 362hrs then at 100tpa you'd expect 4 tons of H2 and 12 tons of graphite. If they haven't sold any H2 or graphite then it would be hard to hide.
Regarding the cost of the feedstock Glen forgot, in his comparison with electrolysis of water, to mention the cost of water relative to the cost of methane.
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