Fediverse Symbol ⁂, ok so I've redrawn all three icons at 16x16, mostly quantized to the pixel grid. The top center asterisk is annoying because it has to be offset by half-pixel horizontally for the icon to be centered in its frame. The pentagram is somewhat more readable like this, but still something of a colorful pixel jumble. And to no one's surprise, the Meta's icon wins because it's so simple geometrically.