1. As far as I know the algorithm is not documented, however it can greatly influence the results in bullet and blitz games.
2. I have the impression it sometimes works to my advantage, and sometimes to my disadvantage.
It's documented just not the specific algorithm
https://support.chess.com/article/423-why-did-the-clock-times-suddenly-change-the-clocks-seem-broken
1. As far as I know the algorithm is not documented, however it can greatly influence the results in bullet and blitz games.
2. I have the impression it sometimes works to my advantage, and sometimes to my disadvantage.