Protect your WordPress Posts, Pages, Tags, Categories, URIs, BuddyPress/bbPress, and even portions of content within Posts, Pages, themes, plugins. Easily configurable & highly extensible. You can even protect downloadable files and streaming audio/video. Store files locally, or use s2Member's integration with Amazon®.
s2Member is powered almost entirely by WordPress shortcodes, making complex integrations quick & easy. Sell recurring (or non-recurring) subscriptions with lots of flexibility. Or sell "Buy Now" access in various ways. You can also sell specific Posts/Pages, sell access to file downloads, or sell Custom Capabilities that provide highly configurable access to specific portions of your content.
info: https://s2member.com/