I think this is no different than the slots you find in casinos or those video poker machines in some bars.
Basically the house edge is clearly a rip-off but people are still playing their game.
All they need is a few gamblers a day and it's goodnprofot for them.
I dunno how house edge is calculated. I check winning % in bet history. Right now, there are 5 10x wins out of last 50 bets. Which means, winning ratio is 50:50. Is not it good?
In this case you did not lose anything, but 50 bets are not representative.
Moreover, dice sites, that require user to sign up, may track betting pattern of a gambler and generate random numbers accordingly. This probability is absolutely non-existent in this game.
You can track betting patterns without signing up.
If the games are not provably fair, they can generate whatever they like and this totally independent of your betting pattern!