"As to "filing for bankruptcy", that far-fetched hypothesis has been aired, blared and and shunted on to sidings for a long time now. The plain fact is -- it's never happened! You have to ask: why should it, anyway?"
....because, the relationship here is linear. The longer time goes on (without revenues) the higher the probability of BK would be.
Gloss that over that as much as you like, but this is a simple business reality, and this company's been "surviving" for quite some time without any revenues to speak of.
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