long story short....
2 weeks ago there was a bug appeared during the event where some players just mysteriously received an ebb coupon (you're probably one of them) and last week they fix it by removing the bugged coupon and the ebb ingame but there are some players that their legitimate earned ebb are taken too so they do an emergency maintenance, roll backed the server (which have created new problem where some players lose creds, sailors, etc or duplicated sailors) until then it is being restored... the end