I imagine there were a lot of angry calls from Washington and Beijing over this. I don't think companies are magnanimous like this without external pressure.
No one in Washington or Beijing with diplomatic credentials and contact with the other side even knows what DNS is or that there was an attack on Friday.
A lot of Chinese companies are both privately owned and awash in money, and that gives them the latitude to behave in ways that aren't strictly about achieving maximum Pareto efficiency.
These guys are doing the right thing. Please don't try to minimize that.