I can't understand one thing here.
Gambling websites usually promote their sites as best web to visit for gambling and winning.
It's normal because it's part of their promotion. No one will attract to play to their casino if their advertisement is just like this "Come and Play here, We are the worst casino ever". Kidding but it's part of business just don't play by just reading their advertisement but review their casino by yourself first.
They tell you: Come here and win big but also at the same time they offer investment option and here they say again - invest and profit much. Website profits when users lose money so..
This also at the same time means: Players lose much here, so invest in our bankroll to get huge profit with us.
Can't understand of those casinos..
Casino doesn't win always, Just like gamblers, They can be lose too so their promotion is quite right. Players can win huge amount that's why they need some investors to back them up to cover big bank roll bets. So don't get confused on it.
I like your part about winning, it's impossible to win all the time. Casinos and gamblers, you can support casino or to be a gambler, we choose on which side to be, and why to not he on both?
Not all casinos have investment option, in some cases casino have its own bankroll. Why casinos open their door for investors is simple to understand, they aiming for higher bankroll, that's the way for attracting high rollers and more players.
I invested in couple casino bankrolls, its not big but I have something from that. In the same time I like to gamble, to me its like win win situation, why not to take advantage of it when we can.