Skepticism, Science & Pseudoscience

1. The time-span between the submission of the paper and the publishing of the paper is surprisingly low. For normal papers, it's about 2 months. For a paper from a predatory journal, I have seen going it from submission to publishing in 4 days.

2. The layout looks unprofessional. There is unused space on the page. Real journals do the layout all by themselves and they give the paper a professional, compact and even look.

3. The graphics are bad. For example, the pixel-resolution is so low that you can't see details, even if you zoom in. Or diagrams simply look sloppy, as if the author didn't care what other people think about them.