You misunderstood the announcement. They wanted to achieve break-even operating costs of $10,000/tonne and achieved an actual of $9,200/tonne, thus improved on their goal by $800/tonne.
The current Lithium price is $16,300/tonne as per the latest pricing I can find:
https://seekingalpha.com/article/4077382-lithium-miner-news-month-may-2017
Thus their profit is ~US$7000/tonne and they are designing to produce 2,500 tonnes per year and thus the payback is 2 years and 5 months, with an ROI of 15.5% (not optimised) and an NPV of $75million USD over 10 years.
I understand the comment around commitment and agree with you there. I just think you may have misread or misunderstood the announcement.
