What do you mean by internal dollars? i think it can be directly pegged to bitcoin USD value(as marlboroza said about mega moolah slot). so for example if price is $1000 and minimum bet value is $1 we'll be betting 0.001 BTC and when price is $2000 it'll be betting 0.0005 BTC and so on..
Bitcoin USD value (rate) can have accident change in short time, so user will be discouraged.
Today rate is 2540.01 so bet of $1 should be 1/2540.01 = 0.00039369. Not much comfortable.
And who will calculate this?
Internal dollar should have stable rate during some period (day) and value ABOUT dollar. This will help users to estimate their decisions. People still think about money in dollars
while attempting to simplify and stabilize your complicating and pushing away those who actually prefer to have the possible edge while using BTC.
if over simplifying means over complicating then what is the true meaning of sending a few USD and exchanging them to btc to send to you internal dollar then back again ? each step will have its minimal charge and time and delays and wow i already got board of the idea before i finished my first sentence.......
Conversions with internal dollar don't need a time and doesn't charged. People, who use bitcoins, preferred to keep their actives in bitcoins. Again, no conversions, no charges. Not sure I understand you.
Its many places to use dollar.....