I understood how pausable works. However, I want to find more real case study of it.
I don't think any token would use it. But I know that tokens are using functions that allow to stop trading or they use blacklisting.
Tether (USDT) is pausable. See https://etherscan.io/token/0xdac17f958d2ee523a2206206994597c13d831ec7#code