>>5724025 (lb)
I wondered about that too. Most of what I’ve read about ICC, leads me to believe the value is in getting testimony of witnesses and victims, along with other evidence “on file” for later use.
The have convicted, arrested and imprisoned a few though.
List Of ICC Detainees
ICC actual arrest % is pretty low.
https://www.icc-cpi.int/news/seminarBooks/bookletArrestsENG.pdf