They have (gasp) changed their schedule. Imagine! A carrier changing a schedule!
Effective December 1, the carrier will move its 10:30 Stansted departure to 18:10, resulting in an arrival to JFK of 21:09 the same day.
A rather more innocent explanation than:
I wonder if they have gone bust and STN have grounded it here! haha!
Airline failures are sometimes predictable but never really a source of humour. I doubt that you've ever experienced one if you see it as funny.
I have no connection to Eos and I still have some doubts about their business model. I hope they succeed, but if they fail I won't be laughing - they will deserve credit for having tried.
I think your "haha!" is in poor taste...