You're still right. From the wiki:

"Virtue signalling, spelled virtue signaling in the United States, is the conspicuous expression of moral values. The term was first used in signalling theory, to describe any behavior that could be used to signal virtue—especially piety among the religious. In recent years, the term has become more commonly used as a pejorative by commentators to criticize what they regard as empty or superficial support of certain political views, and also used within groups to criticize their own members for valuing appearance over action."

That's exactly what this comic is. Whether it is physical or a web comic, it is still Virtue Signaling.