As part of their value add, journals don't seek out additional referees. Don't check that the contact information of suggested referees is correct. And no paid editor checks the manuscript has plausibly passed review. It just gets thrown through their automated system until they hit "accept with minor revision" or reject.
This is of course in addition to the following non-services:
* Requiring the authors to perform all typesetting. * No copyediting * No paid referees
For which they charge in general several thousand USD for an open access publication or extortionate subscription fees.