I don't think there's anyone who's actually even claiming to be missing funds. This is how rumors start. Someone says "is anyone missing funds?". Next post "I think OP is checked out". Next post "those who are missing funds should do X".
Well, the OP himself claimed that he has some funds due to the players:
Sorry about the late reply. The only debt right now is the funds that are being held in the offline wallet which is 0.263 BTC.
...
And very shortly after people couldn't log in. So likely there are few people with some balance, but since the amounts are small, no one gives a shit.
Thanks, pawell777, that explains the context a little better. However, the OP can't be expected to keep the site online forever just in case someone finally comes along looking for 10mBTC. It seems to me to be reasonable that eventually the site closes and the if someone who left some money in an account comes along, they'll need to contact the admin via email or some other method.