If you want to make money with your MyBB forum, you’ll probably use ads to generate revenue. Google Adsense is a popular choice for example.
But a lot of visitors are using adblockers in the meantime and you’ll loose a lot of money this way.
This is a way to prevent adblockers on your MyBB forum to make a business out of your MyBB.
Open your MyBB Admin CP and visit the Templates & Styles section. Choose Templates.
Open the templates of your theme and find the ungrouped templates: