I'm in it till the end.
I see a few scenarios playing out:
1) Kevin only has enough funds left to refund some people, after which he has to shut the doors, leaving the remaining people with nothing.
2) Kevin continues building the games with the remaining funds. Once some games are out, it is likely some people will no longer want refunds and others may want to fill the spots of the people who still want out.
3) Kevin is unable to produce the games regardless of the money he has left.
In case 1, some people get their money back and in case 3 nobody gets their money back, but no machines get produced in either case. Only case 2 has a chance for success.
So for me it's pretty simple since I'm not okay with getting a refund if it contributes to Skitb closing shop, leaving the remaining investors holding the bag and no machines for anybody.