They shut down their casino in early 2016. Most likely because they couldn't attract enough players to keep their business running and from their latest posts back then, it is obvious that there were too many bugs on their platform.
By googling their name, this is the only relevant result I could find:
https://forum.bitcoingambling.io/threads/has-the-luckyflop-eu-bitcoin-poker-site-shutdown.23/well, my perception is different towards the user
What if the account changed hands?
Actually that's quite possible too but we cannot really know without an evidence or as long as the (new) owner doesn't do something stupid. (like starting to post in a local board which he didn't post before)