AFAIR, I invested in dice bankroll in year 2017 and it wasn't as profitable as I was expecting.
Well, we know that when there is a house edge, casinos will win all the time but don't expect you'll get big profit with your small investment and that discourages me because I also witness that there are casinos that goes scam and take the of the investors. (there's a lot of them, we can do a research)
with that experience, I decided to divest my money and invest it in altcoins and bitcoin and I am lucky I do it on the right timing and indeed it's more profitable than investing in a casino's bankroll.
Yeah, small investment means small returns/profit. Also, even if you make huge amount of investment, don't expect huge profits within few days. You "will" make profit, but that is going to be in the long run. Remember, in the long run, the house always wins (due to house edge), which means, you will also be making profit along with the casino.
Sorry to hear that you got scammed. Unfortunately, you invested on a casino that had no reputation at all. Make sure you invest on a casino that is well known in this community.