This time you got lucky because only 25 points were deducted from your rating. Had I taken the screenshot where you refused to accept my second draw offer, your rating whould have been reduced by 113 points.
This brings up an interesting question. Can a double chaser be simultaneously hit with a draw refusal case?
My personal view, in an initial contemplation, is that this should not happen. For me that's because the I feel double chasing is less intuitive than draw refusal. And d/m chasing already has its own penalty schedule where, although there's a loss of the game penalty from the very first offense, there's one out and out freebie in terms of any further punitive penalties given. If a victim of a double chase is able to simultaneously press for a draw refusal from his double chasing opponent, then now the double chaser gets penalized stiffly on his first offense, instead of having the one break built into the d/m chasing penalty schedule.
Plus, on the second offense for draw refusal a player gets his ELO dropped to 100. If we combine the d/m chasing penalty with that, we're punishing the d/m chaser far harder than the current -100 points penalty. It just gets too gnarly to try and mix these two different offenses and their penalty schedules in my opinion.