Check out "bitcoingamblingreviews.com" they have a whole section where the founder actually spent money on investing into casinos for a long period of time, I think it was for a whole year. Now he is doing it again with more money as well.

As expected his earnings increased a lot during the peak times and not doing so well right now but you can see month by month how well he did and the increases and decreases and what you could expect from which one and so forth. He also shares all of his posts on steemit as well, I guess his website was more of a "review" so he moved the investment part to steemit, last I can see he lost a bunch of bitcoin and money because of the investment he made to bitdice, but places like crypto-games and yolodice made him a decent return.