Dear @fraque,
thank you for your feedback, it’s very important for us. I’m sorry to read that you think our plugin has no functions, probably you did not realised where the plugin features are available:
YITH WooCommerce Membership allows you to restrict access to contents in your site, such as posts and pages.
You can create a membership plan in YITH Plugins -> Membership and then, for each posts and pages, you can set the “Allows access to” option to “All-Members”: this way these contents will be visible for members only.