Hi,
I can see another bugs on your plugin demo: https://demo.mythemeshop.com/s/?theme=Content Locker
I will list all problems below:
1. Just open the page, I got this error:
Social locker bugs:
1. If I click on tweet, the plug-in show the content without I do anythig.
2. G+ does not exists (you should remove it).
Sign-in Locker Bugs
First I refreshed the page
1. Linkedin click: no popup and js error
2. Email error: I can use a fake@email.com, then the plugin will show the content. I know you can tell about double opt-in configurations. But I tested in my site, with double opt-in confirmation. The plugin shows the content without I confirm the email.
after submit
3. The last issue is about Google sign-in. Please believe me. Your live demo works, because your google app at https://console.developers.google.com has a feature called Legacy People API. This feature is no available to new apps. If you create a new app at google and use a new api key and api secret for this new app, your live demo will not works to.
Well, I hope to help you with all tests you want.
Thanks!