None of them "walked". They all pled guilty and have not been sentenced.
[0] https://s3.documentcloud.org/documents/23495436/crypto-coope...
[1] https://www.washingtonpost.com/business/2022/12/21/caroline-...
That has nothing to do with her sentencing and is typical of any plea agreement. I’m not going to plead guilty to crimes without the guarantee that you’ll not charge me with more. What would be the point of pleading guilty then?