well as you can gather on non competetive terms this is never really an issue so there there isn't a worry (obviously that doesn't apply to gambling, that's more for smaller localised clients) when it comes to gambling we try to cover all the bases so that when algorithms do change we don't suffer, How it works in this niche is that we value each keyword individually and offer a money back guarantee on each one so as not to have to give massive refunds if one term dips, which is reasonable. And when I say each term that doesn't mean that a long tail will have equal value to a hollywood term. In a lot of cases we will guaratee all the terms as a package, but understandably in some niches that is simply not viable in case one term bobbles.