The Pancake lottery system was implemented two years ago just as the Reddit thread was created. Doesn't sound shocking I have seen this on the lottery system in one of the casinos that offer gambling tokens for shared revenue.
Can't say people will really play on a decentralized casino even if its code is open source, there are lots of them trying hard but none successfully made it.
There’s always a room for a new projects and if this one succeed, the better. Trying to understand now how this site works, will need to know more information about this first before anything else. Lottery is fine for me as lot us its fairness is ok and doing this on a blockchain can be more ok, maybe this site just need more market exposure.