well, i dont know so much about how to make dice betting site like bitlser, primedice, 999dice, etc. how are they make it? and how much assets they have to make dice betting site? btw, i found a simple dice betting called
https://dice.seuntjie.com/, template are made with very very very simple. are that site are using free template?
That site was made from the open sourced untitled-dice
https://github.com/untitled-dice/untitled-dice.github.ioBut if you want to actually stand out then you'll have to do more than just copy paste it.
Primedice was made using their own bankroll and to make a site more like them you'll need ~20 btc as bankroll atleast, either the ability to code or a coder you hired, and a few gfx things.