I don't know if that post is yours or linked, but "just to clarify" sounds as though it is leading to something worth considering.
First answer one very easy question: Why would the EU concede an extension?
Clues:
Don't swallow the Belgian's bile; the EU want us in not out, the gods were gobsmacked by the Ref1 result, and have since done all they could to negate Brexit.
They're sitting pretty right now, having trounced May and watching as gov, parties and country are divided; but they get into the spirit by scrambling to implement cosmetic measures for public consumption against a no deal, knowing there will be no no-deal.
They also know the only real options after the crap deal was so soundly rejected are to revoke A50 or Ref2 with a stay option which will almost certainly win since the EU and Remainers won't be so complacent next time around. ie if Ref2 is announced, the propaganda machine goes into warp drive.
Meanwhile, extending A50 requires unanimous agreement by all 27 members, and unless there is something substantial in it for the EU this won't happen. What is substantial from the EU pov, short of Ref2?
Revoking A50 without Ref2 leads to a constitutional crisis, civil unrest and other fun stuff, so no need to describe the likely consequences of simply ignoring Ref1, not even in this thread.
They have manoeuvred May into a corner, almost certainly with her consent, and all they need to do is wait as the clock ticks down; they don't even need to squeeze, our PM has done that for them.
So, what is there to clarify in regard to an A50 extension?