Comment on OA Publisher Recent Science Launches with 38 Journals by Rens W. van der Heijden

Rather unrelated, but replying to your 5 page limit question: this is commonly found in computer science workshops of reasonable prominence (more normal is 2-3, as far as I know). These will only get one or two reviewers though. Many conferences similarly have a six page limit, although some more prominent ones go for 8 up to even 16 (>2 reviewers, or rarely, 2). Note that this is dual column format (standard IEEE/ACM templates); the equivalent in single column is usually about a factor of 1.7 more.