"There is no reason why haven't wrote them off already other than the fact they consider this act illegal or they will use the SPS and their LP as leverage when time comes for a capital restructuring."
That's certainly possible. Either way - write down, or capital restructuring, or combination of both. The answer is the same - it hasn't happened because they don't feel compelled to do it yet. Only when they are being released is any of this relevant.
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