Ninja Popups combines a professionally designed popups to convert visitors on your site/blog into taking an action whether its subscribing into your newsletter, offering a discount/coupon for leaving customers, or locking content until they share you will increase your subscriber count and social signal of your site/blog.
Best WordPress Plugin
[Demo]: Ninja Popups v2.4 for WordPress Plugin
[Download]: Ninja Popups v2.4 for WordPress Plugin
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