According to the JManga Facebook page, their sister site JManga7
is now open. They will be updating the site with new chapters seven days a week. Paid subscribers have unlimited access to all the titles on the site, no ads, and access to an app for mobile devices. Free users have access only to the latest chapters. If you already have a JManga account you can log into JManga7 with the same account. The titles mirror the titles JManga.
Sources: Jmanga Facebook Page