So I’m not even going to bother.
And if those warnings aren’t enough, here’s Writer Beware on the subject.
Furthermore, SFWA† has ruled that Hydra is not a qualifying market for membership purposes.
If all of that isn’t warning enough for the wary, then I don’t know what is.
†The Science Fiction and Fantasy Writers of America. For acronymic purposes, the second F is superimposed upon the first.