the functionality of showing popup at exact page visit number isn’t satisfying for me because sometimes user reads article too fast and moves to other page before popup shows.
therefore I set to show on first page view and Restart counting after 0 days.
but if a person really doesn’t want to sign up for newsletter I don’t want to annoy them with popup.
in the next version of plugin I suggest adding a cookie after close button is pressed – and setting another parameter “restart counting after popup closed”