I can't see a plausible scenario in which they don't at least break even. They will, almost certainly make a profit. If they find themselves unable to defraud insurance companies in sufficient numbers (i.e. not enough JWs have insurance) then they'll just write letters and go on their tv show and tell everyone to donate money to be used for the victims and people will give.
As far as rebuilding their property (kingdom halls, etc) they'll just charge the locals for that too. I'm sure they're insured as well, so they'll do the usual insurance scam there and make a tidy profit.