Lets say I start a poker site. What percentage of a coin do you think I would need to own? The reason I would want a large percentage is because I want the coin bootstrapped to my site so the more popular it gets the more value is add to the coin.
I guess it would be similar to how the bitcoin was bootstrapped to silkroad in the early years.
So in theroy lets say I have 30% of a coin and start my poker room it takes off and I have thousands of players. The coin was valued at $1 when I started now its at $2. Now what if when I started I only list the coin on one exchange, mine. That should increase the value immensely when my poker room takes off right? Other exchanges are going to buy large amounts thus creating the demand?
It all depends on how successful your coin becomes. If the site is famous, only then the value of the coin might go up . But since it would probably not have any other use except for being usable only on that site , therefore it could go down as well. In the start unless you have all the mining and other things, the value will likely go down. Also it will not be straight away added to an exchange just because it is just another altcoin.
You know, OP's idea is not too off from what's happening with CLAM and Just-Dice. JD only uses CLAM nowadays, and CLAM probably would have been just another altcoin, but JD's popularity and usage of it is giving it a long lasting stability which is otherwise unexpected. But, as you said, and as I said on the bottom of the last page, the casino needs to be trusted or famous for this to work. JD build their reputation with Bitcoin and nowadays it can pretty much support it's own crypto. But to try it the other way around is putting the cart before the horse.