First the user is asked if he wants

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On some sites you can see double pop-ups. to receive a bonus, and when he clicks "Yes", the first pop-up is replaced by a form for collecting contacts. On the one hand, this separates the information, on the other - not everyone will dare to click the button when it is not clear what may appear there next.
Leave your email to find out the result
The user sees a pop-up where he is offered to take a test. When he passes all the stages of the test, the person needs to leave his contacts to find out the result.
Subscribe to the newsletter
These pop-ups simply offer to subscribe to a newsletter, while motivating the whatsapp number list user with useful and unique content. Some pop-ups have no motivation at all, only a block for entering data and a "Subscribe" button. Such windows work well if the site has earned a reputation with the user.

Vnukovo Outlet Village offers subscribers to be the first to know about news and offers:Returning
Pop up when the user is about to close the tab: "Already leaving? Are you really going to close the site without taking advantage of our discount?" and crying kittens. Such pop-ups can still be found somewhere in the depths of search results.
We will call you back