I get why people type "sneak peak" instead of "sneak peek." None of us are immune. (I, for one, make a ton of typos.)
What I don't get is why professional wordsmiths, like the writer and editor behind this AOL News link, haven't learned to double check the spelling before publishing it to a
professional site. It's like "lead" in place of "led" -- an issue proofreaders know to watch out for.