I just read freebitco.in is/was facing ddos attack from its competitor probably (also they mentioned about spike on wagering numbers). So, there are many reasons for a website to go down and people do worry on unavailability of a service when they need. I agree that fortunejack is serving all of us for years and maintaining their reputation levels at high hence worrying on when they are down is not making any sense in my view as well.
Honestly, I do play at fortunejack and I never find them down. Probably their site may face some hiccups due to recent launch of new version and bug fixing but not in longer duration.
It does matter if you are playing in fortunejack as well, because there are so many scam websites out there that affects fortunejack as well. You and I could know why fortunejack is a legit place and would never scam you, however think of a person who got into crypto only 6 months ago, got into crypto casino world only 3 months ago, played in 2 places and all of which turned out to be a scam that doesn't pay you back and never see your money again and you find fortunejack as the new place everyone talks about greatly and you put money there and you face a problem, what would be your reaction?
You would think that would be your third time getting scammed. Obviously in the end you will realize fortunejack is not a scam, but the first reactions are sensible in this scenario.