Really? That seems crazy. I understand grip taking a dump but physical tire damage from rolling a frozen tire is new to me.
Happens often.
The Cup2's are so soft, the lifespan is ~10000 street kms! They crack in the cold, if moved. At $3k for 4 corners, that's a tough one to choke down.
I had them swapped off mine (Cup 2's standard with Z07 pkg) for PSS's before I took it home. 8,000kms on it, and they still look fine.