I believe that in Daily Chess, there should be a forced space between when you can offer a draw (e.g. if you offer a draw on move 20, you have to wait something like ten moves to offer another one on move 30, then 40, etc.) This has come up because, in one of my Daily Games, an unnamed player has offered a draw VERY repetitively, almost every move, when he is down 16 points of material vs. a lone king.