Huh, Banned again, just as I thought
If this had to be done officialy you would see a foot long notice of "Terms and Conditions" and an even lengthier "User agreement" which you would have to agree to in order to get online.
It would have had all sorts of warnings and humiliations(because you violated the terms in the first place
), well may be no humility but still they would make you sign a lot of contracts before doing such a thing intentionally. Also they would have make it look like that they have given you a brand new console! I mean they would praise them selves a lot for doing such an act.
So in short it was most likely a error or may be they were just secretly testing the outcomes of Unbanning everyone.
We might see this happening again as a legal procedure