If you are interested to know what gambling website's are offering Investment, you can check this website:
https://dicesites.com/They list all of the website's offering it and additional information for it.
Very useful resource right there, though it isn't exactly clear how much players are profiting from their bankroll investments.
It could do with some updating, but I'll definitely look a bit further into investing thanks to this site.
+merit for you.
Based on the link, some of the sites does not offer an investment opportunity and these are big sites IMO.
Anyway, I hope someone would be able to make a thread for his experiment investing in dice bankroll so we will see if it's still profitable until now.