The main aim of using newsletter popups is to have a high-quality subscriber list and to turn visitors into life-long customers.
Offering unique selling proposition to attract visitors' involvement and offering something precious in exchange for visitors' personal information are two keys to success in building an email list.
You can get maximum conversion using this popup with harmony of purple and white colors. In the popup, $10 discount is offered in exchange for the user's email address. As you can experience, the popup has 3 different types of presentation opportunities: full screen, sidebar and lightbox popup.
Moreover, what you need to consider is that full screen popups are the most preferred and the most conversion procuring popup type. Although popups are thought to disturb users, they are used by many famous marketing experts.