My
super duper conspiracy theory is that a couple of the Phase girls asked the rest of the company to start using the phrase, then asked their group of vtuber indie/corpo friends to do the same to "annoy an anti."
Word kept getting passed along, plus other indies and small corpos who just copied the phrase because they heard it used, and now we have a good chunk of the entire EN vtuber space using it.
All because someone in PC like Pippa or Lumi or Hime wanted to mess with
@superduper