So here's a thing. Windstream did file for bankruptcy in 2019, and the wording of the "Letters" doesn't look misleading, scare mongering, maybe? But potentially true. Still, Windrush gets some much-needed money to pay off debtors, I suppose.
https://arstechnica.com/tech-policy/2021/04/charter-must-pay-19-million-for-tricking-customers-into-switching-isps/