From: Ann Shumelda Okerson <[log in to unmask]>
Date: Wed, 15 Jun 2016 19:27:15 -0400

"Ultimately, we felt that SpringerPlus covered too wide a range of
disciplines, from the natural sciences to engineering and the social
sciences. These are very different research communities, with very
different needs when submitting or transferring manuscripts, and a
one-size-fits-all journal is not the solution."

http://springerplus.springeropen.com/about/springerplus-faqs

How are other mega journals faring?  A number were launched.

Ann Okerson