As of February 2022 the NiNJA stealth service is no more.
A billing issue with our server host (BuyVM) resulted in the termination of our servers with no prior warning.
This coupled with my own poor off-site backup practices over the last couple of years resulted in the loss of almost everything server side.
Our good friends over at xbOnline will be taking over from here. All lifetime client cpukeys have been transferred over to their service.
Links to both their site and discord can be found below.