Black-hat SEO may have some perks in the short term, like more traffic or higher rankings, but Google is quick to penalize sites that use black-hat approaches to SEO. Since these techniques go against Google, it looks like you are trying to be intentionally deceitful for your site’s benefit. Search engines are getting better and better at detecting black-hat SEO techniques. If you catch a penalty from Google, you will likely drop severely in ranking. Or, your site could be removed from rankings completely. In that case, you will see less traffic, less customers, and less revenue. Following a white-hat approach will save you from Google penalties and build trust with your site visitors. If you want to make sure your site does well long-term, you should opt for honest, SEO-approved techniques.