Why not? I'm not stealing any of their code. This has been done hundreds of times (every dice site is pretty much a clone of PrimeDice in some way, if you look at them). I wouldn't steal the design either, I'd just build something structurally similar, and website design ideas are stolen every day anyway. No one makes a website
expecting no one to copy it.
While it is true that many people are stealing ideas from some other people or some other sites, it is still morally not right.
no offense but what you are saying is that because there is a casino in vegas there shouldnt be other casinos with the same games offered.
thats a dream for the first one on the market
I am not saying there shouldn't be any dice games, roulette or blackjack because someone else has developed it already.
What I want to say is that new site owners shouldn't look for cloning 99% of a site and changing just 1% of it.
For example, PD and JD offer pretty much the same game, but do you consider one a clone of another? I don't.