This Pavel Durov guy sent a resignation letter on April 1 saying that he resigned. Then a follow-up letter on April 3 stating that this was an April Fools joke and he'd like to recall the resignation letter.
Now, the VK social is undergoing hostile takeover and there's lots of going on that we don't know about.
What most don't seem to understand is:
You don't make such kind of jokes on April 1st without expecting consequences.
* Your boss joked "you're fired, pack your shit" and gave you a pink slip on April 1st
* A senior developer joked "I'm tired of all this bullshit and all you dumbass bozos building pointless crap" and gave his resignation on April 1st
* The CEO joked "I'm tired of all this bullshit and all the f-ing politics I have to deal with" and gave his resignation on April 1st
and made a follow-up two days later saying that was a joke and the statement should be recalled.
This still is a sad day in the history of Russian Internet. It seems that blocking of stuff is getting more and more aggressive (Navalny's blog was banned simply because he's under house arrest and is not supposed to use the internet). Some ISPs even roll out DPI which is sadly a better alternative to DNS-based blocking because of much less false-positives.