CHESS.com strategy
I´m not so long playing on CHESS.com. In my games I noticed that some players are slowing down when they are worse or losing. At first it didn´t make any sense to me. You are going to lose this game anyway, so why slow down?
And then I saw the idea behind it. It has to do with that number on your screen: highest rating.
When you slow down the games you are going to lose you can make an new highest rating. After you reached that, you resign all you losing games. You rating goes down a lot and it starts all over again.
I hope that more you understand now why some people continue playing in a dead-lost position. I saw a lot of complains about this.
Good luck with your games!