Very strange that you guys got DDoS, maybe we are at the beginning of a new Bitcoin bullrun because if I recall sites usually get DDoS during a bull market. Anyone know if any other casinos were targets this week? Yours seem to be the only one I can find.
Either way regarding the investments I do see a point he is trying to make however his definition of risk isn't correct. Basically if gamblers leave the site just makes less money, and they get less money so the risk is the same just the profits might be smaller.
However if the site was always down constantly which it isn't then gamblers might get fed up and leave and join another site. So less gamblers less revenue however risk from a bankroll is still the same.
I wouldn't worry, these things happen from time to time with almost all sites some even not crypto related. Facebook was even down in the past and people still use it.