Also PLOS ONE and a whole bunch of IEEE journals.

Frontiers is really interesting to me, because some colleagues in other fields view their "version" of Frontiers In $Field as a meh journal of last resort, and I view Frontiers in Public Health as actively malign.

Some Frontiers journals are good. You have to go look at individual paper on merit.

This completely undermines the purpose of peer-reviewing, though.

If it's necessary to do your own peer-reviewing for a publishing house, it could just as well be arxiv.

I know, but that's the reality. Sometimes the garbage I read from some journals is the reason I want to quit academia. How the hell those get published!! I have stopped taking journals at face value. Many things I read from Science or Nature journals (in my field) are just wrong