How is that something worth going viral over? Salespeople get fired all the time for not meeting their sales goals. Engineers similarly get fired all the time for not meeting their productivity goals. If you don't do your job well, don't expect to keep it.
And if I recall correctly, in this particular case, she was a green employee who hadn't even made a single sale yet! What more obvious of a layoff target is there than that? Would you keep a green unproven salesperson over a proven veteran salesperson who's landed 9 figures in sales?