And again, $6M isn't really funding any serious legal action, is it? A couple of lawyers' lunch expenses, maybe!
It seems that licensing fees from Microsoft were not insignificant part of litigation costs.
[0] https://www.computerworld.com/article/2566954/sco-caps-legal... [1] https://www.computerworld.com/article/2563673/update--micros... [2] https://www.sec.gov/edgar/search/#/q=Microsoft&dateRange=all...
What would be the first stages of the Extinguish stage? If I were them, I would start from neutralizing Stallman. He is the pillar of Free Software, a smart hacker who created GCC and devoted his life towards values that are completely at odds with Microsoft's vision. I would use every occasion to discredit him and eliminate him from exerting any influence.