Bill Maurer hates Tesla and Seeking Alpha is in no way peer reviewed or even subject to the rules of reality. It's basically the Huffington Post of investment advice in that you make no money from posting and there's nothing stopping you from hanging up a shingle.
The actual news is that they've beat their own sales records. Of course, Maurer was all "sales plunge!" which pretty much demonstrates he writes what he wants without worrying about reality.
The short interest in Tesla is ridiculously high. It's the king of cult stocks. And generally, if you want to manipulate people into making your short play work, the way to do it is to blather on Seeking Alpha.