Pay with a Like is a great plugin, however –
If your post is long and it has a quick navigation links which move you to different parts of the post using the
<a name="section5">..</a> kind of links, these links stop working if you have these anchors in the protected content.
Could this be improved to include all the
<a name="..."></a> tags in the .pwal_container element which is the message showing up instead of protected content? That way clicking these quick navigation links, it would show the message asking user to share the article.