I've used Dream maybe once or twice more than 6 months ago, in favor of AlphaBay, but I definitely had an account there. Now, with Alpha likely gone forever, I tried logging back into Dream to see if my usual vendors were already there, and it says "user not found" in any of their mirrors.
Has this happened to anyone else? Do they, for some reason, delete accounts after an idle period? I'm pretty sure I had some leftover coins in there (not enough to make me care, though I had a lot more on Alpha. Lesson learned).
Happened to me too.
Put my account in "Vacation Mode" and came back to try and login and got the same message, "User not found".
Talked to the mods about it and they gave no reason. Told me that my username does not exist. Seemed that they might not have believed me that I ever did have an account.
I didn't lose any coins and I don't think there is anything malicious going on. Probably a software bug or perhaps some type of mistake was made.