Harry’s answer to “For those who 'eye' read the book, did you think the unconventional punctuation served a worthwhile…” > Likes and Comments

Perhaps it is a protest against unnecessary punctuation rules? The Oxford comma is just a convention, making no difference to comprehension, so I agree: shove it. I don't think the same can be said for the full stop/period, but if she did it as a stunt to make a point, I like it.