I'm not going any further on that site. I didn't want to, the thought of death is bleak enough as it is.
It's rubbish, it's decided by an algorithm. It doesn't take into account anything that could happen before you die naturally.
You might get murdered, you might get killed in a war, you might get a terminal illness.
That thing is all in good fun, but please remember it's a load of crap really.