No issues with Virgin here. As has been said lemmy.world and lemmy.ml were down for over an hour the other day but everything is humming along nicely now.
Back when I was last on VM, I remember they had the adult site blacklisting switched on by default. I can't imagine why Lemmy would be falling foul of that, but maybe that's the issue?
It's possible...The list tends to work in a knee-jerk way. If something abhorrent was reported on the platform, it's possible they blocked the lot.
It's also possible it got flagged as porn, and OP has the default grot-filter enabled (it is by default).