I would like to add, while i was initially frustrated with the "no reason" declines, that recently I am seeing the reviewers point out the problem. this makes it 100x easier to fix and resubmit. I get tagged on mostly minor punctuation problems, or spelling was missed on 1 word.
However, I also find something odd. The reviewer will say "x" word is bad in your article. I go check the article and that word does not appear on ANY of my spun content. How does this word show up for the reviewer but it's not in any of my content in the article? I saw 2 today JUST with this problem. All I can do is just resubmit it, since my spun version does NOT have the word.