Pop-ups should be fun, and users should enjoy them. That’s exactly what the Wheelio does. As they spin, you both win – and this is reflected in the final product. Collecting FB Messenger opt-in: Opt-in opt-in is only supported with Facebook Messenger Subscription. In a friendly and productive manner, you will accumulate Messenger subscriptions. A wide range of features and options: from coupon injection to various styles, to advanced pro kits with authentication and segmentation, to integrations with email providers, and much more.