Doing a bit of research, "Seeking Alpha" appears to be a front for shorters/short term traders. They seem to specialize in "bad news" articles; they release negative articles, depress the stock price of a company very slightly, the traders buy, then when the stock recovers, they sell, making a reasonable profit.
They are a clever scheme because, legally, they operate in such a way that legal screens covering fraudulent trading practices cannot be proven.