Besides ETH, what tokens have implemented a sustainable burn mechanism?

BNB. With BEP95 a fixed ratio of gas fees are burned every block. There's also a quarterly burn based on price. In the past Binance bought back 20% supply at various epochs in order to burn while bootstrapping BSC.

Real time info:

musician & dev gigameshmusic.com github.com/gigamesh

BNB. With BEP95 a fixed ratio of gas fees are burned every block. There's also a quarterly burn based on price. In the past Binance bought back 20% supply at various epochs in order to burn while bootstrapping BSC.

Real time info: https://www.bnbburn.info/