Chris McMullen has delved into the Amazon ebook mistakes issue for us, so if you want to know more, check out the link below. I’m wondering if they will flag bad grammar or problems with tense or POV. They are going off readers comments, so who knows.
Though I can’t believe they care that much about “the readers experience” to really police people’s writing that much. It would only make sense if it affected their bottom line somehow, and I can’t imagine keeping a poorly edited book up on their site that might not have that many sales can’t really be an issue for them. It hurts the author, but that is a whole different topic!