Per TFA's conclusion: If dynamic thinning continues to increase at the same rate of 4 [gigatons/year] with no offset from further increases in snowfall, the positive balance of the [Antarctic ice sheet] will decrease from the recent 82 [gigatons] to zero in ~20 years. However, compensating increases in snowfall with climate warming may also be expected.
Apparently, warming has added mass via more snow, and the paper doesn't appear to address possible bedrock rebound from thinning ice. At some point, temperature will likely increase to the point where added snowfall can't keep up with the ice outflow. At the moment, the changing dynamic of the climate seems to be causing counterintuitive local changes, like added snowfall in the eastern US and eastern Antarctica, due to added water vapor in the air.