What is black hat SEO?
It works, right?
Yes, it works. But Google continuously adjusts its search algorithm and unfortunately we have little insight into this. This could mean that you could receive a penalty from Google without notice for applying black hat SEO.
You will not consciously receive this penalty, but it will be reflected in your Google rankings, and therefore your visitor numbers. A sudden drop could simply indicate a penalty or change in the search algorithm.
Especially with the arrival of Google Rankbrain, it is important not to concern yourself with black hat SEO, but to focus only on the approved ‘white hat SEO techniques’.