This setting does not answer the OPs question, the setting you are showing him deals with users who have not been on the site in a very long time, e.g. the users that we stop sending summary emails to over time because they have not been on your site for more than a year (the default).
In other words, if 52 weekly digests don’t convince a user to log in and visit your website, it is super unlikely that 53rd or 150th weekly email summary is gonna magically do the trick either.
(still, it is badly named @neil)