There doesn't appear to be any side bets, progressive payouts, novelty games, limited time good rules, any of the things casinos use to promote blackjack. This is especially true for what seems like a community of people who are already engaged with other projects on the algo blockchain. As much as people complain about playing with other players, and them ruining your game, losing the social aspect (and scapegoat) by playing alone isn't great. Based off what I could gather on your website and subreddit, your blackjack game is pretty boring. If you can show us that would be helpful. I don't have a wallet so I can't see your actual game. and focus on the blackjack, which is what you're asking about.
I'm going to move past most stuff I have to say regarding the premise, the stake structure, issues in most players being investors, the fact that you're using a deflationary token as a substitute for chips so players are incentivized to not play, etc.