I'm not affiliated with the dice game in any way. The dice game is a scam if it doesn't allow people to withdraw their coins from the service, and I haven't seen such posts. Same goes for your lottery, if you run with the ticket money or don't pay out the wins after the lottery your service is a scam.

It's really stupid to accuse a form of gambling a scam if it really isn't one. If you started running a lottery in Las Vegas and started shouting that the casinos are scams because they always win in the long run what would you expect to happen? You'd get sued for libel.