If that winner didn't respond or claim the prize, can it be split among us here?

I don't think so,
The prize must be there whenever the user log into his account
I doubt he will collect it, dude probably hasn't even logged in a long time as well if he is as old as that and hasn't even used free roll and only got one ticket all week from just one affiliate rolling only once. Like all of that combined tells me that this dude is basically just a guy who is no longer on the website anymore.
TheQuin could probably be the only person who has access to something like that, he can probably check and say when was the last time he visited the website and if he is still active time to time. If he is a guy who visits like once a month or so, or maybe even once every few months, that is still cool, he will eventually come in and see that he won and be super happy. However if he hasn't visited in months that means there is a chance that money will stay there forever, at least he will earn some interest

.
As any member won any prize from lottery then system sent him an email about this so hopefully he already claimed this prize and enjoying and TheQuin is not admin he is only for freebitco.in PR and only admin can access to all accounts so he cannot check this all whats going on as its really good for members.