I think I have suggested Casineos to make something new for the promotion to see which kind of promotion that will get more interests. Especially about the prize distribution system, as for now the prizepool is distributed equally to all participants so probably make it something like a tournament where winners get different percentage from the prizepool based on the entries.
Then go to wagering competition if you want different winners percentage.
They already have wagering competition using different cryptocurrency for right now only XRP and BTC, could be other cryptocurrencies in the future. For right now, less participant was really good for "Roll Hunt" because we have more balance to be win. As always, when you see a lot people join must calculated the prize did really worth with the money you are gamble or not.
If not, then freely to skip the event.