I just closed the tab on this one, I seriously doubt it will return.
The fact that it shutdown is and should not be a surprise to anyone, the only question ever is how long will they be online.
The "calculation" you have to make on programs like this:

How much did they spend on the site, ssl certificates, coding and finally at what point are they content with their profit.

In this case I put in like 20 EURO got 20 and some cents back. Sometimes you make a lot, sometimes you lose.

Golden rule is always never put more than you can laugh at losing, this is gambling.

Now grow a pair and stop whining and move on.