How do so many crappy novels get published?

This thread reminds me of this one I posted way back in April. The books in question in my thread are absolute rubbish, with horrid English, and the writing practically reeks of pretentiousness. The (currently) last post in that thread is by MrAtoz sums up the situation:

I’m just expressing surprise at how many authors I’ve been running across lately that seem to be succeeding (for certain values of “success”) despite not composing very readable prose.

There’s a lot of rubbish, and evidently a lot of people who like rubbish.