As with many other subreddits, /r/LegalAdviceUK (which had been dark since the start of the blackout) has been sent a thinly-veiled threat by Reddit.
So they've reopened in order to start moving the entire community of 810,000 subscribers to somewhere else.
As you can imagine there are a number of legal professionals who moderate that sub, and they really don't take kindly to being threatened. They sign off their reopening message with "Fuck /u/Spez and long live John Oliver." but for the real fun you might want to look up a very famous British legal case they reference, Arkell v Pressdram 1971.
Reddit is both stating the protests are having no or minimal effect, whilst at the same time giving away free ad-space to try and keep advertisers, and doing everything it can to force subreddits to re-open. The protestors are both weak, and strong, depending on which argument makes Reddit look less-terrible at any given time.
Fascist societies rhetorically cast their enemies as "at the same time too strong and too weak". On the one hand, fascists play up the power of certain disfavored elites to encourage in their followers a sense of grievance and humiliation. On the other hand, fascist leaders point to the decadence of those elites as proof of their ultimate feebleness in the face of an overwhelming popular will.
to forget whatever it was necessary to forget, then to draw it back into memory again at the moment when it was needed, and then promptly to forget it again