About a year ago EditDNS was bought by Dyn Inc. They have in fact ruined the old site and tried to lure as many customers as possible to their site. They didn't honor lifetime memberships at EditDNS and even charged money for migration. Their prices are absolutely unrealistic as well. Hosting your DNS with them costs more than hosting a whole server. Fortunately there are some alternatives left.
Currently the site's nameservers are mirrored in four locations, which should provide plenty of redundancy.
Additionally the most popular nameservers run by ISP are monitored hourly to detect any anomalies.