Pay for Post with WooCommerce Premium v3.0.6

Sell access to pages, posts, and custom post types quickly and easily through WooCommerce Pay Per Publishing with WooCommerce.

This plugin creates a custom field where you just need to view your product or multiple products that you need to purchase to view the post.

It checks if the user is logged in and bought this particular product before. If so, they see the general content of the message. If they have NOT purchased, they are then shown a content restriction message with a buy now button for the product.