think you will be better off to introduce ranks for players same as every other dice site does
VIP status for 3 days only doesn't incentivise players to come back and gamble more,especially if their original session was unsuccessful
also,a new player will be having difficulties in trying your games out without a faucet
it is just my IMHO though,maybe you have a different marketing strategy that includes giveaways and promotions etc
so the new players can get hooked and become returning customers