This is worrying, I know a bit about these things. The private keys are all publicly announced on the blockchain, according to the article...
The paper has not been published yet, I am wondering if BTERCOM hack has anything to do with this researcher and method
Or bitstamp hired a few hackers or this researcher to recover their own losses ?

BTER i dont trust much tbh. Hopefully this wont be another mintpal story.
Anyhow this could explain all this selloff today. people securing their funds. i certainly do for the moment.