There has always been a bunch of "black hat" ways of jumping up the serp rankings. Actually there still are a bunch of ways to spam Google like using crowdsourcing. Taking those shortcuts could endanger brands and your long term profits. Now with Google rewarding https and mobile friendly sites, you can give yourself a significant boost just by following the rules and think it is safe to say that boost grow even more. I'm surprised by the large number of big and small websites that still haven't implemented https or mobile friendliness.