This code can be used as is to hide free levels from the membership levels page. You can also tweak the condition on line 13 differentiate between levels in a different way.
Adding the recipe to your website
You can add this recipe to your site by creating a custom plugin or using the Code Snippets plugin available for free in the WordPress repository. Read this companion article for step-by-step directions on either method.
Free Course: Membership Site Development—The Basics
Develop a deeper understanding of membership site development in this beginner-level course. Learn how to make your site work better, save yourself time and money, and improve your site's performance.