And also put into consideration that more people are joining the blackjack casino, so there is every chance that reward would decrease over times since the number of users being rewarded from that pool have increased drastically.
Actually the total player has no effect on the prize because it has been set only the top 4 will get a prize so I think this is not the right reason
Another thing to note is why new players come to Blackjack.fun obviously they have a reason well if what they expect is not available then they can just leave.
I dont check much the total prize pool but did you mean top 4 only will get BTC reward and the rest will get free spin reward? Because rewarding only top 4 user will be quite unappetizing for new players considering how huge the wager volume of Blackjack.fun whales.
A little suggestion to the team. Why not introduce a minimum wagering volume requirements in able to get the tournament prize to avoid giving undeserved reward. Like a minimum 1000$ wager volume more or less. This way you can guarantee a good return on the rewards and bring back the Bitcoin rewards again on top 10 or so.