Indeed the commission taken by the site is a thing in cases like this, the site took 2500 LTC of commission this week.
There options like what's done by bustabit to keep a commission of 50% without affecting the investors durings huge loss. The commission is taken only when the site is at its ATH profit.
Also there is new investors because their expected value is much higher when there is a low bankroll (they can have a higher %) and when there is a player wagering a lot, its theorically the best moment to invest.
I also did it after losing a lot first i added another investment yesterday. So sometimes the new investors you see are in fact the old investors who added some additonal money.
Yeah, the fact that if you lost money you should not be paying anything more but when you earn money you should be paying even more could make the casino same amount of profit while also helping out the bottom as well. Let's say there are 2 people who put 10 dollars, one of them had their investment drop to 9 dollars, and you also took 1 dollar out of them, so now they are at 8, that is not really nice for them, but let's say another earned because gambler lost, his 10 dollars became 11, and you took 1, that means he didn't lose anything (and neither won but he could wait for 12 if he wants).
If you spread it bigger, you could take 2 out of the winner, and that way instead of 1 from loser and 1 from winner, casino could do 0 from loser and 2 from winner, same amount goes to casino, but losers are doing better.