Whenever the bankroll's profit exceeds its previous high point, bustadice will receive 50% of the profits beyond the high point. No commission is collected on profits below the high point. For example, say the bankroll's profit high point is 100 BTC, its current profit is 99 BTC and players combined lose a total of 4 BTC in a round. 3 BTC of that is net profit (exceeding the previous all-time high), so bustadice would receive 1.5 BTC and the remaining 2.5 BTC would go to the bankroll. The commission is charged in real time, so investors can continue to invest and divest whenever they like.
For players, nothing changes other than the wager and profit limits increasing by a third as mentioned above.
Which format worked out better and would give more net income on average for investors: Bustabit taking 0.25% commission on all wagers or what remains of their share after Bustabit deducts its share?
Investors were getting 75% of what the casino was expected to make. Now, only 50%, essentially dropping expected returns by 1/3.