Nitrogen Sports Maintenance01.06.2017Update 9:50AM: Nitrogen is back online and has completed its maintenance. Nitrogen Sports (SBR rating B+) is presently down for maintenance. The bitcoin exclusive sportsbook updated Twitter ten minutes ago advising users of the downtime. The Nitrogen Sports homepage also displays a note regarding the maintenance. Nitrogen Sportsbook has not given an ETA but has said that they will be back up shortly.