I believe online gambling already exists in Great Britain, and I'm sure there are other countries, so there would be strong competitive forces at work. What would make ZNGA special among the crowd? The only edge would be better odds, and hence diminished returns. The regulatory complexities still remain huge, as each nation would demand its cut of the winnings. You would need ten floors of accountants, lawyers versed in the different languages, and lobbyists with cash in hand. How would any nation enforce bookkeeping honesty on a company like ZNGA, as the whole thing is easily open to corruption?