Gambling dice games and random number generators like this are the lowest of low in terms of dapp development.
Thats why you have a million of them.

They're the simplest and easiest way to move steem from the pockets of the community into the pockets of devs who are more often then not anonimus like was the case with @magic.dice.
Magic dice that committed a swift exit scam and stole folks money.
Not saying that will happen with this dev but reason for caution especially when dealing with low effort development like this should be at a much higher level.

If I can make gambling dapp developers feel unwelcome even a bit and they avoid steem, I'd feel good about it.
Gambling transactions are almost completely worthless anyways. Most done by Bots running scripts.