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. But if they wan to created competition with a real player only can use "Fight of the emperor".
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 be calculated the prize did really worth with the money you are gamble or not.
If not, then freely to skip the event.
I'm not talking about the wagering competition but I'm suggesting for the current on going competition to be changed a bit especially about the prize distribution to make more challenging, where players keep on betting to collect entries till the end of the competition. The current on going competition makes participants stop betting once they collect the required entries.
Coming up to the game Fight of the Emperor, I doubt it will bring more entries as the game is not popular and not many players knows how to play it well. So if the main idea is to get more participants, using the common game dice/blackjack is more effective imho.