What's new here is that the sales pitch about shorts needing to be covered has more truth to it (I think, not an expert) than the usual vague promises about a huge turnaround being right around the corner. Usually the argument that other buyers will follow you is based purely on their supposed FOMO
Impossible pump and dump bubbles are a very old and well-trafficked phenomenon. This particular case is a bit interesting, because it appears that the pumping may be a fully distributed phenomenon - but even then, it shouldn't surprise anyone if news eventually breaks that there was some organized group behind it.