The divergence that I see in Ligety's picture is a result of an early transition to what will soon become the new outside ski for the next turn. (Similar but less pronounced example with Jansrud. Bode is showing something different, so this description doesn't apply to him.)
There is now more weight on the inside ski, so it keeps tracking the arc, and the outside ski is less weighted and runs straight, which means it is diverging relative to the inside ski.
Is it intentional? I guess it doesn't really matter for Ted if he won the race.
However, I do see this regularly with people that I coach, and based on observed outcomes (the clock being the final arbiter), I don't encourage this as part of good technique. The more typical outcome is an inadequately weighted inside ski that skids and dumps speed. The skidding puts the racer below the desired race line, and from there he is in recovery mode to get back on to the fast line for the next gate.
The photo-montage for Ligety shows a different outcome, and the divergence isn't so evident through the whole sequence. To me, this brings up another possibility for Ligety: the divergence was a technical error that he quickly recovered from.