It seems to me that you are complaining about their decision to side with all these non provably fair game provider  but I truly get your point and your frustration on this matter. For a site like Stake that boast their site being provably fair to side with all these game providers might seems to be an unpleasant thing to some people

They have made their decision and have put all those 3rd party game on their site, This will be a starting point to wether Stake will be much more popular in the future with all these new games or this would be their downfall for siding with non provably fair provider. I personally choose to believe on the former option 

Btw, Stake put the house edge of those 3rd party game in the game description unlike some other site that host the same game 

---

You should try and check their live game like Monopoly, its fun to watch even if you are not betting any