[russelluresti]

This comment needs an asterisk that I'm going to provide.

* Your results may vary. Actual numbers largely depend on how the popup is implemented (when it shows up, how often it shows up, etc). And even in the cases where you get increased sign ups, studies have shown that those who sign up via a popup have considerably lower engagement metrics, indicating that they signed up by mistake or they signed up because they thought they had to (note that a sign up, in-and-of itself is just a vanity metric with no meaning if it doesn't lead to increased engagement).