Well, here's what we know in the absence of a link that directly says "BioAmber stock will be cancelled."
BioAmber is bankrupt.
It is deeply in debt.
They put the whole company up for sale. Nobody put a bid in.
All of the operating assets were sold, including the factory that was the source of any revenue.
The monitor that is managing the proceedings says the proceeds from the sale of the assets (which is documented at $4.3M) will only partially repay the secured debt holders.
The monitor says there'll be no recovery to the remaining unsecured debt holders and no recovery to the common shareholders.
All that remains is to sell off whatever inventory remains and distribute the proceeds.
Once that is done, the court will discharge the remaining debt and equity.
Every time the court does that, the company in question disappears. You can't discharge the debt and leave the company and equity standing.
All of that is supported by all the "Empirical evidence" you could ever ask for. And, no, nothing that has been cobbled together "connecting dots," "reading between the lines," or "implications" is empirical evidence, everything that has happened or is happened is stated directly in the monitor's reports, no sleuthing required.
That is reality and it will happen despite attempts to mislead people into buying shares of this company.
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