Using your influence and means to promote positive change isn't virtue signaling. This isn't the same as adding a filter to your facebook profile picture.
When did "virtue signalling" become the de facto insult against people standing up for human rights? I've been seeing it a lot around hacker news and from various alt right outlets. I've seen it exclusively in dismissive tones to imply that advocacy only exists in a performative dimension.
I find it amusing because the implication is that the alt-right views virtue as a perjorative.