Sv WP - CMS Members - Membership Plugin - Version 5.1 CMS Members: WordPress Membership Plugin, WordPress PayPal Subscription Aweber Plugin - WordPress Wave. The best wordpress membership plugin helps you make your membership site with PayPal IPN recurring subscription aweber plugin order form mass mailer. WP Membership - Membership Plugin: CMS Members is really more than a WordPress membership plugin. It not only provides a perfect WordPress As CMS solution for your site, but it can also be your new eCommerce platform. Just imagine having an elegant e-Commerce site built with the power and simplicity of WordPress. We can build you a sign up page, order form, newsletter subscription, premium theme community, etc …